Initial sources.

Based on 2db8607f75d8884d1dc424cb4d8ae7a81dff76ec
2019-09-06 09:53:55 -04:00 · 2019-09-06 09:53:55 -04:00 · 0fc372e174
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,235 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# Remove everything beginning with a dot
+.*/
+!.github/
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+launchSettings.json
+
+# Build results
+[Dd]ebug[-\w]*/
+[Dd]ebugPublic/
+[Rr]elease[-\w]*/
+[Rr]eleases/
+[Xx]64/
+[Xx]86/
+# [Bb]uild/
+bld/
+[Bb]in/
+[Oo]bj/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.mdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.binlog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+
+# TODO: Un-comment the next line if you do not want to checkin 
+# your web deploy settings because they may include unencrypted
+# passwords
+#*.pubxml
+*.publishproj
+
+# NuGet Packages
+#*.nupkg
+# The packages folder can be ignored because of Package Restore
+#**/packages/*
+# except build/, which is used as an MSBuild target.
+#!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+# NuGet v3's project.json files produces more ignoreable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Microsoft Azure ApplicationInsights config file
+ApplicationInsights.config
+
+# Windows Store app package directory
+AppPackages/
+BundleArtifacts/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+[Ss]tyle[Cc]op.*
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.pfx
+*.publishsettings
+node_modules/
+orleans.codegen.cs
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Paket dependency manager
+.paket/paket.exe
+
+# FAKE - F# Make
+.fake/
+
+# Xamarin Android
+Resource.Designer.cs
+*.bak
+*/nuget_version_override.txt
+/src/crosstargeting_override.props
+/build/tools/**
+!build/tools/packages.config
+/build/*.nupkg
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@ -0,0 +1,115 @@
+jobs:
+- job: Windows
+
+  pool:
+    name: Hosted
+    
+  variables:
+    NUGET_PACKAGES: $(Agent.WorkFolder)\.nuget
+
+  steps:
+  - checkout: self
+    clean: true
+
+  - task: NuGetToolInstaller@0
+    inputs:
+      versionSpec: 4.9.1
+      checkLatest: false
+    
+  - task: GitVersion@4
+    # Ignore gitversion for forks, until this is fixed:
+    # https://developercommunity.visualstudio.com/content/problem/284991/public-vsts-previouw-cant-set-build-number-of-pr-b.html
+    condition: eq(variables['System.PullRequest.IsFork'], 'False')
+    inputs:
+      updateAssemblyInfo: false
+
+  - task: DotNetCoreInstaller@0
+    inputs:
+      version: '2.2.103'
+
+  - task: DotNetCoreCLI@2
+    displayName: .NET Core Build
+    inputs:
+      command: build
+      arguments: --configuration Release  "/p:PackageOutputPath=$(build.artifactstagingdirectory)\nuget" "-p:PackageVersion=$(GITVERSION.FullSemVer)" "/p:InformationalVersion=$(GITVERSION.InformationalVersion)" /detailedsummary
+      workingDirectory: $(build.sourcesdirectory)\src
+
+  - task: DotNetCoreInstaller@0
+    inputs:
+      version: '2.1.504'
+
+  - task: PowerShell@2
+    displayName: Authenticode Sign Packages
+    inputs:
+      filePath: build/Sign-Package.ps1
+    env:
+      SignClientUser: $(SignClientUser)
+      SignClientSecret: $(SignClientSecret)
+      SignPackageName: "Uno.PackageDiff"
+      SignPackageDescription: "Uno.PackageDiff"
+      ArtifactDirectory: $(build.artifactstagingdirectory)
+    condition: and(succeeded(), not(eq(variables['build.reason'], 'PullRequest')), not(eq(variables['SignClientSecret'], '')), not(eq(variables['SignClientUser'], '')))
+
+  - task: PublishBuildArtifacts@1
+    condition: always()
+    inputs:
+      PathtoPublish: $(build.artifactstagingdirectory)
+      ArtifactName: unosourcegenerator-drop
+      ArtifactType: Container
+            
+  - task: VSTest@2
+    inputs:
+      testAssemblyVer2: |
+        **\*tests.dll
+        !**\obj\**
+      vstestLocationMethod: version
+      vsTestVersion: latest
+      testSelector: testAssemblies
+
+- job: Linux
+  workspace:
+    clean: all
+
+  pool:
+    name: Default
+    demands:
+    - agent.os -equals Linux
+    
+  variables:
+    NUGET_PACKAGES: $(Agent.WorkFolder)/.nuget
+
+  steps:
+  - checkout: self
+    clean: true
+  
+  - task: DotNetCoreInstaller@0
+    inputs:
+      version: '2.2.103'
+
+  - task: DotNetCoreCLI@2
+    displayName: .NET Core Build
+    inputs:
+      command: build
+      arguments: --configuration Release /detailedsummary
+      workingDirectory: $(build.sourcesdirectory)/src
+
+- job: macOS
+
+  pool:
+    vmImage: 'macOS-10.13'
+
+  variables:
+    NUGET_PACKAGES: $(Agent.WorkFolder)/.nuget
+    SourceLinkEnabled: false
+
+  steps:
+  - task: DotNetCoreInstaller@0
+    inputs:
+      version: '2.2.103'
+
+  - task: DotNetCoreCLI@2
+    displayName: .NET Core Build
+    inputs:
+      command: build
+      arguments: --configuration Release /detailedsummary
+      workingDirectory: $(build.sourcesdirectory)/src
--- a/13
+++ b/13
@ -0,0 +1,13 @@
+ Copyright 2011 Xamarin Inc
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
--- a/README.md
+++ b/README.md
@ -0,0 +1,35 @@
+---
+name: Xamarin.Forms - RPN Calculator
+description: An RPN (Reverse Polish Notation) calculator allows numbers and operations to be entered without parentheses or an equal key. RPN (also called...
+page_type: sample
+languages:
+- csharp
+products:
+- xamarin
+urlFragment: rpncalculator
+---
+# RPN Calculator
+
+An RPN (Reverse Polish Notation) calculator allows numbers and operations to be entered without parentheses or an equal key. RPN (also called postfix notation) is described in the Wikipedia article [**Reverse Polish notation**](https://en.wikipedia.org/wiki/Reverse_Polish_notation) and the [**RPN Calculator**](https://github.com/xamarin/Workbooks/blob/master/xamarin-forms/advanced/RPNCalculator/RpnCalculator-ios.workbook) workbook, which shows an alternative approach to coding an RPN calculator for Xamarin.Forms.
+
+RPN is based on a stack. Numbers are pushed on the stack by pressing the ENTER key. Unary operations (such as **log** and **sin**) pop a number from the stack, apply the operation, and push the result back on the stack. Binary operations (such as **+** and **/**) pop two numbers from the stack, perform the operation, and push the result on the stack.
+
+To perform the calculation
+
+5 &#x00D7; (3 + 4) &#x2013; 2
+
+press the following keys:
+
+5 ENTER 3 ENTER 4 ENTER + &#x00D7; 2 ENTER &#x2013;
+
+The + operation adds 3 and 4, the times operation multiplies 5 and that result, and the minus operation subtracts 2 from that result.
+
+The layout of the keys appears twice in the **MainPage.xaml** file, separately for portrait mode and landscape mode. The **MainPage.xaml.cs** code-behind file switches between these two layouts based on the relative width and height of the page.
+
+The calculator logic is encapsulated in the **RpnCalculatorViewModel.cs** file. The XAML file and the ViewModel are linked through XAML-based data bindings, which are described in detail in the series of series of articles on [**Data Binding**](https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/data-binding/), and particularly the [**The Command Interface**](https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/data-binding/commanding) article.
+
+![RPN Calculator application screenshot](Screenshots/01Portrait.a.png "RPN Calculator application screenshot")
+
+## Author
+
+Charles Petzold
--- a/RpnCalculator.sln
+++ b/RpnCalculator.sln
@ -0,0 +1,392 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29230.61
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RpnCalculator.Android", "RpnCalculator\RpnCalculator.Android\RpnCalculator.Android.csproj", "{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RpnCalculator", "RpnCalculator\RpnCalculator\RpnCalculator.csproj", "{646CC755-F4B2-4321-9DA9-44FB2BE685DD}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RpnCalculator.UWP", "RpnCalculator\RpnCalculator.UWP\RpnCalculator.UWP.csproj", "{66A02B35-05B5-4ACB-BD40-2333E443AF65}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RpnCalculator.iOS", "RpnCalculator\RpnCalculator.iOS\RpnCalculator.iOS.csproj", "{C0357C97-217F-4612-BAF0-B343D16131FA}"
+EndProject
+Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "RpnCalculator.Uwp.Shared", "RpnCalculator\RpnCalculator.UWP\RpnCalculator.Uwp.Shared.shproj", "{D511FA0B-8EFD-4E0C-B84F-910558B282DA}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RpnCalculator.Wasm", "RpnCalculator\RpnCalculator.Wasm\RpnCalculator.Wasm.csproj", "{1EC5438F-07D3-4F1F-A5E5-358810E70695}"
+EndProject
+Global
+	GlobalSection(SharedMSBuildProjectFiles) = preSolution
+		RpnCalculator\RpnCalculator.UWP\RpnCalculator.Uwp.Shared.projitems*{d511fa0b-8efd-4e0c-b84f-910558b282da}*SharedItemsImports = 13
+	EndGlobalSection
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Ad-Hoc|Any CPU = Ad-Hoc|Any CPU
+		Ad-Hoc|ARM = Ad-Hoc|ARM
+		Ad-Hoc|iPhone = Ad-Hoc|iPhone
+		Ad-Hoc|iPhoneSimulator = Ad-Hoc|iPhoneSimulator
+		Ad-Hoc|x64 = Ad-Hoc|x64
+		Ad-Hoc|x86 = Ad-Hoc|x86
+		AppStore|Any CPU = AppStore|Any CPU
+		AppStore|ARM = AppStore|ARM
+		AppStore|iPhone = AppStore|iPhone
+		AppStore|iPhoneSimulator = AppStore|iPhoneSimulator
+		AppStore|x64 = AppStore|x64
+		AppStore|x86 = AppStore|x86
+		Debug|Any CPU = Debug|Any CPU
+		Debug|ARM = Debug|ARM
+		Debug|iPhone = Debug|iPhone
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|ARM = Release|ARM
+		Release|iPhone = Release|iPhone
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|Any CPU.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|Any CPU.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|Any CPU.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|ARM.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|ARM.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|ARM.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|iPhone.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|iPhone.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|iPhone.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|iPhoneSimulator.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|iPhoneSimulator.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|x64.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|x64.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|x64.Deploy.0 = Release|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|x86.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Ad-Hoc|x86.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|Any CPU.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|Any CPU.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|Any CPU.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|ARM.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|ARM.Build.0 = Release|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|iPhone.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|iPhone.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|iPhone.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|iPhoneSimulator.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|iPhoneSimulator.Deploy.0 = Release|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|x86.Build.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.AppStore|x86.Deploy.0 = Release|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|ARM.Build.0 = Debug|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|iPhone.Deploy.0 = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|iPhoneSimulator.Deploy.0 = Debug|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Debug|x86.Build.0 = Debug|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Release|Any CPU.Build.0 = Release|Any CPU
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+		{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}.Release|iPhone.Build.0 = Release|Any CPU
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+		{C0357C97-217F-4612-BAF0-B343D16131FA}.AppStore|x86.ActiveCfg = AppStore|iPhone
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.AppStore|x86.Build.0 = AppStore|iPhone
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.AppStore|x86.Deploy.0 = AppStore|iPhone
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Debug|Any CPU.ActiveCfg = Debug|iPhoneSimulator
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Debug|Any CPU.Build.0 = Debug|iPhoneSimulator
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Debug|Any CPU.Deploy.0 = Debug|iPhoneSimulator
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+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Debug|ARM.Build.0 = Debug|iPhone
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+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|iPhone.Build.0 = Release|iPhone
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|iPhone.Deploy.0 = Release|iPhone
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|iPhoneSimulator.Deploy.0 = Release|iPhoneSimulator
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+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|x64.Deploy.0 = Release|iPhone
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+		{C0357C97-217F-4612-BAF0-B343D16131FA}.Release|x86.Build.0 = Release|iPhone
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|Any CPU.Build.0 = Debug|Any CPU
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|ARM.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|iPhone.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|iPhone.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|iPhoneSimulator.Build.0 = Debug|Any CPU
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Ad-Hoc|x86.Build.0 = Debug|Any CPU
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|Any CPU.Build.0 = Debug|Any CPU
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|ARM.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|iPhone.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|iPhone.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|x64.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|x64.Build.0 = Debug|Any CPU
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.AppStore|x86.Build.0 = Debug|Any CPU
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+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|x64.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Debug|x86.Build.0 = Debug|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|ARM.ActiveCfg = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|ARM.Build.0 = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|iPhone.Build.0 = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|x64.ActiveCfg = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|x64.Build.0 = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|x86.ActiveCfg = Release|Any CPU
+		{1EC5438F-07D3-4F1F-A5E5-358810E70695}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4D885B29-C625-4F6F-85DE-BF628B34EDCC}
+	EndGlobalSection
+EndGlobal
--- a/RpnCalculator/RpnCalculator.Android/Assets/AboutAssets.txt
+++ b/RpnCalculator/RpnCalculator.Android/Assets/AboutAssets.txt
@ -0,0 +1,19 @@
+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with you package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+	protected override void OnCreate (Bundle bundle)
+	{
+		base.OnCreate (bundle);
+
+		InputStream input = Assets.Open ("my_asset.txt");
+	}
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");
--- a/RpnCalculator/RpnCalculator.Android/MainActivity.cs
+++ b/RpnCalculator/RpnCalculator.Android/MainActivity.cs
@ -0,0 +1,27 @@
+using System;
+
+using Android.App;
+using Android.Content.PM;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using Android.OS;
+
+namespace RpnCalculator.Droid
+{
+    [Activity(Label = "RpnCalculator", Icon = "@drawable/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
+    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
+    {
+        protected override void OnCreate(Bundle bundle)
+        {
+            TabLayoutResource = Resource.Layout.Tabbar;
+            ToolbarResource = Resource.Layout.Toolbar;
+
+            base.OnCreate(bundle);
+
+            global::Xamarin.Forms.Forms.Init(this, bundle);
+            LoadApplication(new App());
+        }
+    }
+}
+
--- a/RpnCalculator/RpnCalculator.Android/Properties/AndroidManifest.xml
+++ b/RpnCalculator/RpnCalculator.Android/Properties/AndroidManifest.xml
@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+	<uses-sdk android:minSdkVersion="19" />
+	<application android:label="RpnCalculator.Android"></application>
+</manifest>
--- a/RpnCalculator/RpnCalculator.Android/Properties/AssemblyInfo.cs
+++ b/RpnCalculator/RpnCalculator.Android/Properties/AssemblyInfo.cs
@ -0,0 +1,34 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("RpnCalculator.Android")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("RpnCalculator.Android")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+// Add some common permissions, these can be removed if not needed
+[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
--- a/RpnCalculator/RpnCalculator.Android/Resources/AboutResources.txt
+++ b/RpnCalculator/RpnCalculator.Android/Resources/AboutResources.txt
@ -0,0 +1,50 @@
+Images, layout descriptions, binary blobs and string dictionaries can be included 
+in your application as resource files.  Various Android APIs are designed to 
+operate on the resource IDs instead of dealing with images, strings or binary blobs 
+directly.
+
+For example, a sample Android app that contains a user interface layout (main.xml),
+an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png) 
+would keep its resources in the "Resources" directory of the application:
+
+Resources/
+    drawable-hdpi/
+        icon.png
+
+    drawable-ldpi/
+        icon.png
+
+    drawable-mdpi/
+        icon.png
+
+    layout/
+        main.xml
+
+    values/
+        strings.xml
+
+In order to get the build system to recognize Android resources, set the build action to
+"AndroidResource".  The native Android APIs do not operate directly with filenames, but 
+instead operate on resource IDs.  When you compile an Android application that uses resources, 
+the build system will package the resources for distribution and generate a class called
+"Resource" that contains the tokens for each one of the resources included. For example, 
+for the above Resources layout, this is what the Resource class would expose:
+
+public class Resource {
+    public class drawable {
+        public const int icon = 0x123;
+    }
+
+    public class layout {
+        public const int main = 0x456;
+    }
+
+    public class strings {
+        public const int first_string = 0xabc;
+        public const int second_string = 0xbcd;
+    }
+}
+
+You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main 
+to reference the layout/main.xml file, or Resource.strings.first_string to reference the first 
+string in the dictionary file values/strings.xml.
--- a/RpnCalculator/RpnCalculator.Android/Resources/drawable-hdpi/icon.png
+++ b/RpnCalculator/RpnCalculator.Android/Resources/drawable-hdpi/icon.png
--- a/RpnCalculator/RpnCalculator.Android/Resources/drawable-xhdpi/icon.png
+++ b/RpnCalculator/RpnCalculator.Android/Resources/drawable-xhdpi/icon.png
--- a/RpnCalculator/RpnCalculator.Android/Resources/drawable-xxhdpi/icon.png
+++ b/RpnCalculator/RpnCalculator.Android/Resources/drawable-xxhdpi/icon.png
--- a/RpnCalculator/RpnCalculator.Android/Resources/drawable/icon.png
+++ b/RpnCalculator/RpnCalculator.Android/Resources/drawable/icon.png
--- a/RpnCalculator/RpnCalculator.Android/Resources/layout/Tabbar.axml
+++ b/RpnCalculator/RpnCalculator.Android/Resources/layout/Tabbar.axml
@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/sliding_tabs"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    app:tabIndicatorColor="@android:color/white"
+    app:tabGravity="fill"
+    app:tabMode="fixed" />
--- a/RpnCalculator/RpnCalculator.Android/Resources/layout/Toolbar.axml
+++ b/RpnCalculator/RpnCalculator.Android/Resources/layout/Toolbar.axml
@ -0,0 +1,9 @@
+<android.support.v7.widget.Toolbar
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/toolbar"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    android:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
+
--- a/RpnCalculator/RpnCalculator.Android/Resources/values/styles.xml
+++ b/RpnCalculator/RpnCalculator.Android/Resources/values/styles.xml
@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<resources>
+
+  <style name="MainTheme" parent="MainTheme.Base">
+  </style>
+  <!-- Base theme applied no matter what API -->
+  <style name="MainTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
+    <!--If you are using revision 22.1 please use just windowNoTitle. Without android:-->
+    <item name="windowNoTitle">true</item>
+    <!--We will be using the toolbar so no need to show ActionBar-->
+    <item name="windowActionBar">false</item>
+    <!-- Set theme colors from http://www.google.com/design/spec/style/color.html#color-color-palette -->
+    <!-- colorPrimary is used for the default action bar background -->
+    <item name="colorPrimary">#2196F3</item>
+    <!-- colorPrimaryDark is used for the status bar -->
+    <item name="colorPrimaryDark">#1976D2</item>
+    <!-- colorAccent is used as the default value for colorControlActivated
+         which is used to tint widgets -->
+    <item name="colorAccent">#FF4081</item>
+    <!-- You can also set colorControlNormal, colorControlActivated
+         colorControlHighlight and colorSwitchThumbNormal. -->
+    <item name="windowActionModeOverlay">true</item>
+
+    <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
+  </style>
+
+  <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">
+    <item name="colorAccent">#FF4081</item>
+  </style>
+</resources>
--- a/RpnCalculator/RpnCalculator.Android/RpnCalculator.Android.csproj
+++ b/RpnCalculator/RpnCalculator.Android/RpnCalculator.Android.csproj
@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{9CD889FB-2A3F-4C95-99CE-F42BF6C0B98F}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>RpnCalculator.Droid</RootNamespace>
+    <AssemblyName>RpnCalculator.Android</AssemblyName>
+    <FileAlignment>512</FileAlignment>
+    <AndroidApplication>true</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.Designer.cs</AndroidResgenFile>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+    <TargetFrameworkVersion>v9.0</TargetFrameworkVersion>
+    <JavaMaximumHeapSize />
+    <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
+    <NuGetPackageImportStamp />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidUseSharedRuntime>True</AndroidUseSharedRuntime>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>portable</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidUseSharedRuntime>False</AndroidUseSharedRuntime>
+    <AndroidLinkMode>SdkOnly</AndroidLinkMode>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="4.2.0.709249" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.ObjectModel" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainActivity.cs" />
+    <Compile Include="Resources\Resource.Designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\AboutResources.txt" />
+    <None Include="Assets\AboutAssets.txt" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable\icon.png" />
+    <AndroidResource Include="Resources\drawable-hdpi\icon.png" />
+    <AndroidResource Include="Resources\drawable-xhdpi\icon.png" />
+    <AndroidResource Include="Resources\drawable-xxhdpi\icon.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Properties\AndroidManifest.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\layout\Tabbar.axml" />
+    <AndroidResource Include="Resources\layout\Toolbar.axml" />
+    <AndroidResource Include="Resources\values\styles.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\RpnCalculator\RpnCalculator.csproj">
+      <Project>{8c293033-a36f-4eca-8277-e26732a0ef60}</Project>
+      <Name>RpnCalculator</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+</Project>
--- a/RpnCalculator/RpnCalculator.UWP/App.xaml
+++ b/RpnCalculator/RpnCalculator.UWP/App.xaml
@ -0,0 +1,8 @@
+<Application
+    x:Class="RpnCalculator.UWP.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:RpnCalculator.UWP"
+    RequestedTheme="Light">
+
+</Application>
--- a/RpnCalculator/RpnCalculator.UWP/App.xaml.cs
+++ b/RpnCalculator/RpnCalculator.UWP/App.xaml.cs
@ -0,0 +1,107 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.ApplicationModel;
+using Windows.ApplicationModel.Activation;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace RpnCalculator.UWP
+{
+    /// <summary>
+    /// Provides application-specific behavior to supplement the default Application class.
+    /// </summary>
+    sealed partial class App : Application
+    {
+        /// <summary>
+        /// Initializes the singleton application object.  This is the first line of authored code
+        /// executed, and as such is the logical equivalent of main() or WinMain().
+        /// </summary>
+        public App()
+        {
+            this.InitializeComponent();
+            this.Suspending += OnSuspending;
+        }
+
+        /// <summary>
+        /// Invoked when the application is launched normally by the end user.  Other entry points
+        /// will be used such as when the application is launched to open a specific file.
+        /// </summary>
+        /// <param name="e">Details about the launch request and process.</param>
+        protected override void OnLaunched(LaunchActivatedEventArgs e)
+        {
+
+#if DEBUG
+            if (System.Diagnostics.Debugger.IsAttached)
+            {
+                this.DebugSettings.EnableFrameRateCounter = true;
+            }
+#endif
+
+            Frame rootFrame = Window.Current.Content as Frame;
+
+            // Do not repeat app initialization when the Window already has content,
+            // just ensure that the window is active
+            if (rootFrame == null)
+            {
+                // Create a Frame to act as the navigation context and navigate to the first page
+                rootFrame = new Frame();
+
+                rootFrame.NavigationFailed += OnNavigationFailed;
+
+                Xamarin.Forms.Forms.Init(e);
+
+                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
+                {
+                    //TODO: Load state from previously suspended application
+                }
+
+                // Place the frame in the current Window
+                Window.Current.Content = rootFrame;
+            }
+
+            if (rootFrame.Content == null)
+            {
+                // When the navigation stack isn't restored navigate to the first page,
+                // configuring the new page by passing required information as a navigation
+                // parameter
+                rootFrame.Navigate(typeof(MainPage), e.Arguments);
+            }
+            // Ensure the current window is active
+            Window.Current.Activate();
+        }
+
+        /// <summary>
+        /// Invoked when Navigation to a certain page fails
+        /// </summary>
+        /// <param name="sender">The Frame which failed navigation</param>
+        /// <param name="e">Details about the navigation failure</param>
+        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
+        {
+            throw new Exception($"Failed to load Page {e.SourcePageType}: {e.Exception}");
+        }
+
+        /// <summary>
+        /// Invoked when application execution is being suspended.  Application state is saved
+        /// without knowing whether the application will be terminated or resumed with the contents
+        /// of memory still intact.
+        /// </summary>
+        /// <param name="sender">The source of the suspend request.</param>
+        /// <param name="e">Details about the suspend request.</param>
+        private void OnSuspending(object sender, SuspendingEventArgs e)
+        {
+            var deferral = e.SuspendingOperation.GetDeferral();
+            //TODO: Save application state and stop any background activity
+            deferral.Complete();
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-100.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-100.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-125.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-125.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-150.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-150.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-200.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-200.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-400.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/LockScreenLogo.scale-400.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-100.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-100.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-125.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-125.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-150.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-150.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-200.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-200.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-400.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/SplashScreen.scale-400.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-100.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-100.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-125.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-125.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-150.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-150.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-200.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-200.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-400.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square150x150Logo.scale-400.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-100.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-100.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-125.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-125.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-150.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-150.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-200.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-200.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-400.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.scale-400.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-16_altform-unplated.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-16_altform-unplated.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-24_altform-unplated.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-24_altform-unplated.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-256_altform-unplated.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-256_altform-unplated.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-32_altform-unplated.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-32_altform-unplated.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-48_altform-unplated.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Square44x44Logo.targetsize-48_altform-unplated.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/StoreLogo.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/StoreLogo.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-100.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-100.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-125.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-125.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-150.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-150.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-200.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-200.png
--- a/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-400.png
+++ b/RpnCalculator/RpnCalculator.UWP/Assets/Wide310x150Logo.scale-400.png
--- a/RpnCalculator/RpnCalculator.UWP/MainPage.xaml
+++ b/RpnCalculator/RpnCalculator.UWP/MainPage.xaml
@ -0,0 +1,15 @@
+<forms:WindowsPage
+    x:Class="RpnCalculator.UWP.MainPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:forms="using:Xamarin.Forms.Platform.UWP"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:RpnCalculator.UWP"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+
+    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+
+    </Grid>
+</forms:WindowsPage>
--- a/RpnCalculator/RpnCalculator.UWP/MainPage.xaml.cs
+++ b/RpnCalculator/RpnCalculator.UWP/MainPage.xaml.cs
@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace RpnCalculator.UWP
+{
+    public sealed partial class MainPage
+    {
+        public MainPage()
+        {
+            this.InitializeComponent();
+
+            LoadApplication(new RpnCalculator.App());
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator.UWP/Package.appxmanifest
+++ b/RpnCalculator/RpnCalculator.UWP/Package.appxmanifest
@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<Package
+  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+  xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
+  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+  IgnorableNamespaces="uap mp">
+
+  <Identity
+    Name="081203ac-505f-48ad-b132-3fcc85a5d74e"
+    Publisher="CN=User"
+    Version="1.0.0.0" />
+
+  <mp:PhoneIdentity PhoneProductId="081203ac-505f-48ad-b132-3fcc85a5d74e" PhonePublisherId="00000000-0000-0000-0000-000000000000"/>
+
+  <Properties>
+    <DisplayName>RpnCalculator.UWP</DisplayName>
+    <PublisherDisplayName>User</PublisherDisplayName>
+    <Logo>Assets\StoreLogo.png</Logo>
+  </Properties>
+
+  <Dependencies>
+    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />
+  </Dependencies>
+
+  <Resources>
+    <Resource Language="x-generate"/>
+  </Resources>
+
+  <Applications>
+    <Application Id="App"
+      Executable="$targetnametoken$.exe"
+      EntryPoint="RpnCalculator.UWP.App">
+      <uap:VisualElements
+        DisplayName="RpnCalculator.UWP"
+        Square150x150Logo="Assets\Square150x150Logo.png"
+        Square44x44Logo="Assets\Square44x44Logo.png"
+        Description="RpnCalculator.UWP"
+        BackgroundColor="transparent">
+        <uap:DefaultTile Wide310x150Logo="Assets\Wide310x150Logo.png"/>
+        <uap:SplashScreen Image="Assets\SplashScreen.png" />
+      </uap:VisualElements>
+    </Application>
+  </Applications>
+
+  <Capabilities>
+    <Capability Name="internetClient" />
+  </Capabilities>
+</Package>
--- a/RpnCalculator/RpnCalculator.UWP/Properties/AssemblyInfo.cs
+++ b/RpnCalculator/RpnCalculator.UWP/Properties/AssemblyInfo.cs
@ -0,0 +1,29 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("RpnCalculator.UWP")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("RpnCalculator.UWP")]
+[assembly: AssemblyCopyright("Copyright ©  2015")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: ComVisible(false)]
--- a/RpnCalculator/RpnCalculator.UWP/Properties/Default.rd.xml
+++ b/RpnCalculator/RpnCalculator.UWP/Properties/Default.rd.xml
@ -0,0 +1,31 @@
+<!--
+    This file contains Runtime Directives used by .NET Native. The defaults here are suitable for most
+    developers. However, you can modify these parameters to modify the behavior of the .NET Native
+    optimizer.
+
+    Runtime Directives are documented at http://go.microsoft.com/fwlink/?LinkID=391919
+
+    To fully enable reflection for App1.MyClass and all of its public/private members
+    <Type Name="App1.MyClass" Dynamic="Required All"/>
+
+    To enable dynamic creation of the specific instantiation of AppClass<T> over System.Int32
+    <TypeInstantiation Name="App1.AppClass" Arguments="System.Int32" Activate="Required Public" />
+
+    Using the Namespace directive to apply reflection policy to all the types in a particular namespace
+    <Namespace Name="DataClasses.ViewModels" Seralize="All" />
+-->
+
+<Directives xmlns="http://schemas.microsoft.com/netfx/2013/01/metadata">
+  <Application>
+    <!--
+      An Assembly element with Name="*Application*" applies to all assemblies in
+      the application package. The asterisks are not wildcards.
+    -->
+    <Assembly Name="*Application*" Dynamic="Required All" />
+    
+    
+    <!-- Add your application specific runtime directives here. -->
+
+
+  </Application>
+</Directives>
--- a/RpnCalculator/RpnCalculator.UWP/RpnCalculator.UWP.csproj
+++ b/RpnCalculator/RpnCalculator.UWP/RpnCalculator.UWP.csproj
@ -0,0 +1,165 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
+    <ProjectGuid>{66A02B35-05B5-4ACB-BD40-2333E443AF65}</ProjectGuid>
+    <OutputType>AppContainerExe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>RpnCalculator.UWP</RootNamespace>
+    <AssemblyName>RpnCalculator.UWP</AssemblyName>
+    <DefaultLanguage>en-US</DefaultLanguage>
+    <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
+    <TargetPlatformVersion>10.0.16299.0</TargetPlatformVersion>
+    <TargetPlatformMinVersion>10.0.16299.0</TargetPlatformMinVersion>
+    <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
+    <EnableDotNetNativeCompatibleProfile>true</EnableDotNetNativeCompatibleProfile>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <PackageCertificateKeyFile>RpnCalculator.UWP_TemporaryKey.pfx</PackageCertificateKeyFile>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|ARM'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\ARM\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;NETFX_CORE;WINDOWS_UWP</DefineConstants>
+    <NoWarn>;2008</NoWarn>
+    <DebugType>full</DebugType>
+    <PlatformTarget>ARM</PlatformTarget>
+    <UseVSHostingProcess>false</UseVSHostingProcess>
+    <ErrorReport>prompt</ErrorReport>
+    <Prefer32Bit>true</Prefer32Bit>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|ARM'">
+    <OutputPath>bin\ARM\Release\</OutputPath>
+    <DefineConstants>TRACE;NETFX_CORE;WINDOWS_UWP</DefineConstants>
+    <Optimize>true</Optimize>
+    <NoWarn>;2008</NoWarn>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>ARM</PlatformTarget>
+    <UseVSHostingProcess>false</UseVSHostingProcess>
+    <ErrorReport>prompt</ErrorReport>
+    <Prefer32Bit>true</Prefer32Bit>
+    <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x64\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;NETFX_CORE;WINDOWS_UWP</DefineConstants>
+    <NoWarn>;2008</NoWarn>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <UseVSHostingProcess>false</UseVSHostingProcess>
+    <ErrorReport>prompt</ErrorReport>
+    <Prefer32Bit>true</Prefer32Bit>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
+    <OutputPath>bin\x64\Release\</OutputPath>
+    <DefineConstants>TRACE;NETFX_CORE;WINDOWS_UWP</DefineConstants>
+    <Optimize>true</Optimize>
+    <NoWarn>;2008</NoWarn>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <UseVSHostingProcess>false</UseVSHostingProcess>
+    <ErrorReport>prompt</ErrorReport>
+    <Prefer32Bit>true</Prefer32Bit>
+    <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x86\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;NETFX_CORE;WINDOWS_UWP</DefineConstants>
+    <NoWarn>;2008</NoWarn>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <UseVSHostingProcess>false</UseVSHostingProcess>
+    <ErrorReport>prompt</ErrorReport>
+    <Prefer32Bit>true</Prefer32Bit>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x86'">
+    <OutputPath>bin\x86\Release\</OutputPath>
+    <DefineConstants>TRACE;NETFX_CORE;WINDOWS_UWP</DefineConstants>
+    <Optimize>true</Optimize>
+    <NoWarn>;2008</NoWarn>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <UseVSHostingProcess>false</UseVSHostingProcess>
+    <ErrorReport>prompt</ErrorReport>
+    <Prefer32Bit>true</Prefer32Bit>
+    <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.0.12" />
+    <PackageReference Include="Xamarin.Forms" Version="4.2.0.709249" />
+  </ItemGroup>
+  <ItemGroup />
+  <ItemGroup>
+    <Compile Include="App.xaml.cs">
+      <DependentUpon>App.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="MainPage.xaml.cs">
+      <DependentUpon>MainPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <AppxManifest Include="Package.appxmanifest">
+      <SubType>Designer</SubType>
+    </AppxManifest>
+    <None Include="RpnCalculator.UWP_TemporaryKey.pfx" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="Properties\Default.rd.xml" />
+    <Content Include="Assets\LockScreenLogo.scale-100.png" />
+    <Content Include="Assets\LockScreenLogo.scale-125.png" />
+    <Content Include="Assets\LockScreenLogo.scale-150.png" />
+    <Content Include="Assets\LockScreenLogo.scale-200.png" />
+    <Content Include="Assets\LockScreenLogo.scale-400.png" />
+    <Content Include="Assets\SplashScreen.scale-100.png" />
+    <Content Include="Assets\SplashScreen.scale-125.png" />
+    <Content Include="Assets\SplashScreen.scale-150.png" />
+    <Content Include="Assets\SplashScreen.scale-200.png" />
+    <Content Include="Assets\SplashScreen.scale-400.png" />
+    <Content Include="Assets\Square150x150Logo.scale-100.png" />
+    <Content Include="Assets\Square150x150Logo.scale-125.png" />
+    <Content Include="Assets\Square150x150Logo.scale-150.png" />
+    <Content Include="Assets\Square150x150Logo.scale-200.png" />
+    <Content Include="Assets\Square150x150Logo.scale-400.png" />
+    <Content Include="Assets\Square44x44Logo.scale-100.png" />
+    <Content Include="Assets\Square44x44Logo.scale-125.png" />
+    <Content Include="Assets\Square44x44Logo.scale-150.png" />
+    <Content Include="Assets\Square44x44Logo.scale-200.png" />
+    <Content Include="Assets\Square44x44Logo.scale-400.png" />
+    <Content Include="Assets\Square44x44Logo.targetsize-16_altform-unplated.png" />
+    <Content Include="Assets\Square44x44Logo.targetsize-24_altform-unplated.png" />
+    <Content Include="Assets\Square44x44Logo.targetsize-32_altform-unplated.png" />
+    <Content Include="Assets\Square44x44Logo.targetsize-48_altform-unplated.png" />
+    <Content Include="Assets\Square44x44Logo.targetsize-256_altform-unplated.png" />
+    <Content Include="Assets\StoreLogo.png" />
+    <Content Include="Assets\Wide310x150Logo.scale-100.png" />
+    <Content Include="Assets\Wide310x150Logo.scale-125.png" />
+    <Content Include="Assets\Wide310x150Logo.scale-150.png" />
+    <Content Include="Assets\Wide310x150Logo.scale-200.png" />
+    <Content Include="Assets\Wide310x150Logo.scale-400.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <ApplicationDefinition Include="App.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </ApplicationDefinition>
+    <Page Include="MainPage.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\RpnCalculator\RpnCalculator.csproj">
+      <Project>{8c293033-a36f-4eca-8277-e26732a0ef60}</Project>
+      <Name>RpnCalculator</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '14.0' ">
+    <VisualStudioVersion>14.0</VisualStudioVersion>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Microsoft\WindowsXaml\v$(VisualStudioVersion)\Microsoft.Windows.UI.Xaml.CSharp.targets" />
+</Project>
--- a/RpnCalculator/RpnCalculator.UWP/RpnCalculator.Uwp.Shared.projitems
+++ b/RpnCalculator/RpnCalculator.UWP/RpnCalculator.Uwp.Shared.projitems
@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>d511fa0b-8efd-4e0c-b84f-910558b282da</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>RpnCalculator.Uwp.Shared</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <Content Include="$(MSBuildThisFileDirectory)Assets\LockScreenLogo.scale-100.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\LockScreenLogo.scale-125.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\LockScreenLogo.scale-150.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\LockScreenLogo.scale-200.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\LockScreenLogo.scale-400.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\SplashScreen.scale-100.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\SplashScreen.scale-125.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\SplashScreen.scale-150.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\SplashScreen.scale-200.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\SplashScreen.scale-400.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square150x150Logo.scale-100.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square150x150Logo.scale-125.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square150x150Logo.scale-150.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square150x150Logo.scale-200.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square150x150Logo.scale-400.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.scale-100.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.scale-125.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.scale-150.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.scale-200.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.scale-400.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.targetsize-16_altform-unplated.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.targetsize-24_altform-unplated.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.targetsize-256_altform-unplated.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.targetsize-32_altform-unplated.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Square44x44Logo.targetsize-48_altform-unplated.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\StoreLogo.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Wide310x150Logo.scale-100.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Wide310x150Logo.scale-125.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Wide310x150Logo.scale-150.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Wide310x150Logo.scale-200.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Wide310x150Logo.scale-400.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Properties\Default.rd.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)App.xaml.cs">
+      <DependentUpon>App.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)MainPage.xaml.cs">
+      <DependentUpon>MainPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <Page Include="$(MSBuildThisFileDirectory)App.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+    <Page Include="$(MSBuildThisFileDirectory)MainPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+  </ItemGroup>
+</Project>
--- a/RpnCalculator/RpnCalculator.UWP/RpnCalculator.Uwp.Shared.shproj
+++ b/RpnCalculator/RpnCalculator.UWP/RpnCalculator.Uwp.Shared.shproj
@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>d511fa0b-8efd-4e0c-b84f-910558b282da</ProjectGuid>
+    <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+  <PropertyGroup />
+  <Import Project="RpnCalculator.Uwp.Shared.projitems" Label="Shared" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>
--- a/RpnCalculator/RpnCalculator.Wasm/LinkerConfig.xml
+++ b/RpnCalculator/RpnCalculator.Wasm/LinkerConfig.xml
@ -0,0 +1,10 @@
+<linker>
+  <assembly fullname="RpnCalculator.Wasm" />
+  <assembly fullname="Uno.UI" />
+  <assembly fullname="Xamarin.Forms.Platform.Uno" />
+
+  <assembly fullname="System.Core">
+	<!-- This is required by JSon.NET and any expression.Compile caller -->
+	<type fullname="System.Linq.Expressions*" />
+  </assembly>
+</linker>
--- a/RpnCalculator/RpnCalculator.Wasm/Program.cs
+++ b/RpnCalculator/RpnCalculator.Wasm/Program.cs
@ -0,0 +1,59 @@
+using Microsoft.Extensions.Logging;
+using System;
+using Windows.UI.Xaml;
+
+namespace RpnCalculator.Wasm
+{
+    public class Program
+    {
+        static int Main(string[] args)
+        {
+            ConfigureFilters(Uno.Extensions.LogExtensionPoint.AmbientLoggerFactory);
+
+            Windows.UI.Xaml.Application.Start(_ => new RpnCalculator.UWP.App());
+
+            return 0;
+        }
+
+        /// <summary>
+        /// Configures global logging
+        /// </summary>
+        /// <param name="factory"></param>
+        static void ConfigureFilters(ILoggerFactory factory)
+        {
+            factory
+                .WithFilter(new FilterLoggerSettings
+                    {
+                        { "Uno", LogLevel.Warning },
+                        { "Windows", LogLevel.Warning },
+
+						// Debug JS interop
+						// { "Uno.Foundation.WebAssemblyRuntime", LogLevel.Debug },
+
+						// Generic Xaml events
+						// { "Windows.UI.Xaml", LogLevel.Debug },
+						// { "Windows.UI.Xaml.VisualStateGroup", LogLevel.Debug },
+						// { "Windows.UI.Xaml.StateTriggerBase", LogLevel.Debug },
+						// { "Windows.UI.Xaml.UIElement", LogLevel.Debug },
+
+						// Layouter specific messages
+						// { "Windows.UI.Xaml.Controls", LogLevel.Debug },
+						// { "Windows.UI.Xaml.Controls.Layouter", LogLevel.Debug },
+						// { "Windows.UI.Xaml.Controls.Panel", LogLevel.Debug },
+						// { "Windows.Storage", LogLevel.Debug },
+
+						// Binding related messages
+						// { "Windows.UI.Xaml.Data", LogLevel.Debug },
+
+						// DependencyObject memory references tracking
+						// { "ReferenceHolder", LogLevel.Debug },
+					}
+                )
+#if DEBUG
+                .AddConsole(LogLevel.Debug);
+#else
+                .AddConsole(LogLevel.Information);
+#endif
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator.Wasm/RpnCalculator.Wasm.csproj
+++ b/RpnCalculator/RpnCalculator.Wasm/RpnCalculator.Wasm.csproj
@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <WasmHead>true</WasmHead>
+    <DefineConstants>$(DefineConstants);__WASM__</DefineConstants>
+    <NoWarn>NU1701</NoWarn>
+    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
+    <MonoRuntimeDebuggerEnabled Condition="'$(Configuration)'=='Debug'">true</MonoRuntimeDebuggerEnabled>
+  </PropertyGroup>
+  <ItemGroup>
+    <Content Include="..\RpnCalculator.UWP\Assets\*.png" Link="Assets\%(FileName)%(Extension)" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="WasmCSS\Fonts.css" />
+    <EmbeddedResource Include="WasmScripts\AppManifest.js" />
+  </ItemGroup>
+  <ItemGroup>
+    <LinkerDescriptor Include="LinkerConfig.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <!-- 
+    This item group is required by the project templace because of the
+    new SDK-Style project, otherwise some files are not aded automatically.
+    
+    You can safely remove this ItemGroup completely.
+    -->
+    <Compile Remove="Program.cs" />
+    <Compile Include="Program.cs" />
+    <Content Include="LinkerConfig.xml" />
+    <Content Include="wwwroot/web.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <!-- Note that for WebAssembly version 1.1.1 of the console logger required -->
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="1.1.1" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Filter" Version="1.1.1" />
+    <PackageReference Include="Uno.UI" Version="1.46.226-dev.2657" />
+    <PackageReference Include="Uno.Wasm.Bootstrap" Version="1.0.0-dev.300" />
+    <PackageReference Include="Uno.Xamarin.Forms.Platform" Version="4.1.0-uno.73" />
+    <DotNetCliToolReference Include="Uno.Wasm.Bootstrap.Cli" Version="1.0.0-dev.300" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\RpnCalculator\RpnCalculator.csproj" />
+  </ItemGroup>
+  <Import Project="..\RpnCalculator.UWP\RpnCalculator.Uwp.Shared.projitems" Label="Shared" />
+</Project>
--- a/RpnCalculator/RpnCalculator.Wasm/WasmCSS/Fonts.css
+++ b/RpnCalculator/RpnCalculator.Wasm/WasmCSS/Fonts.css
--- a/RpnCalculator/RpnCalculator.Wasm/WasmScripts/AppManifest.js
+++ b/RpnCalculator/RpnCalculator.Wasm/WasmScripts/AppManifest.js
@ -0,0 +1,7 @@
+var UnoAppManifest = {
+
+    splashScreenImage: "Assets/SplashScreen.scale-200.png",
+    splashScreenColor: "#00f",
+    displayName: "RpnCalculator"
+
+}
--- a/RpnCalculator/RpnCalculator.Wasm/wwwroot/web.config
+++ b/RpnCalculator/RpnCalculator.Wasm/wwwroot/web.config
@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <system.web>
+    <customErrors mode="Off"/>
+  </system.web>
+
+  <system.webServer>
+
+    <!-- Disable compression as we're doing it throuh pre-compressed files -->
+    <urlCompression doStaticCompression="false" doDynamicCompression="false" dynamicCompressionBeforeCache="false" />
+
+    <staticContent>
+      <remove fileExtension=".dll" />
+      <remove fileExtension=".wasm" />
+      <remove fileExtension=".woff" />
+      <remove fileExtension=".woff2" />
+      <mimeMap fileExtension=".wasm" mimeType="application/wasm" />
+      <mimeMap fileExtension=".clr" mimeType="application/octet-stream" />
+      <mimeMap fileExtension=".pdb" mimeType="application/octet-stream" />
+      <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
+      <mimeMap fileExtension=".woff2" mimeType="application/font-woff" />
+
+      <!-- Required for PWAs -->
+      <mimeMap fileExtension=".json" mimeType="application/octet-stream" />
+    </staticContent>
+
+    <rewrite>
+      <rules>
+        <rule name="Lookup for pre-compressed brotli file" stopProcessing="true">
+          <match url="(.*)$"/>
+          <conditions>
+            <!-- Match brotli requests -->
+            <add input="{HTTP_ACCEPT_ENCODING}" pattern="br" />
+            
+            <!-- Match all but pre-compressed files -->
+            <add input="{REQUEST_URI}" pattern="^(?!/_compressed_br/)(.*)$" />
+
+            <!-- Check if the pre-compressed file exists on the disk -->
+            <add input="{DOCUMENT_ROOT}/_compressed_br/{C:0}" matchType="IsFile" negate="false" />
+          </conditions>
+          <action type="Rewrite" url="/_compressed_br{C:0}" />
+        </rule>
+
+        <rule name="Lookup for pre-compressed gzip file" stopProcessing="true">
+          <match url="(.*)$"/>
+          <conditions>
+            <!-- Match gzip requests -->
+            <add input="{HTTP_ACCEPT_ENCODING}" pattern="gzip" />
+            
+            <!-- Match all but pre-compressed files -->
+            <add input="{REQUEST_URI}" pattern="^(?!/_compressed_gz/)(.*)$" />
+            
+            <!-- Check if the pre-compressed file exists on the disk -->
+            <add input="{DOCUMENT_ROOT}/_compressed_gz/{C:0}" matchType="IsFile" negate="false" />
+          </conditions>
+          <action type="Rewrite" url="/_compressed_gz{C:0}" />
+        </rule>
+      </rules>
+
+      <outboundRules>
+        <rule name="Adjust content encoding for gzip pre-compressed files" enabled="true" stopProcessing="true">
+          <match serverVariable="RESPONSE_CONTENT_ENCODING" pattern="" />
+          <conditions>
+            <add input="{REQUEST_URI}" pattern="/_compressed_gz/.*$" />
+          </conditions>
+          <action type="Rewrite" value="gzip"/>
+        </rule>
+        <rule name="Adjust content encoding for brotli pre-compressed files" enabled="true" stopProcessing="true">
+          <match serverVariable="RESPONSE_CONTENT_ENCODING" pattern="" />
+          <conditions>
+            <add input="{REQUEST_URI}" pattern="/_compressed_br/.*$" />
+          </conditions>
+          <action type="Rewrite" value="br"/>
+        </rule>
+      </outboundRules>
+    </rewrite>
+  </system.webServer>
+</configuration>
--- a/RpnCalculator/RpnCalculator.iOS/AppDelegate.cs
+++ b/RpnCalculator/RpnCalculator.iOS/AppDelegate.cs
@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using Foundation;
+using UIKit;
+
+namespace RpnCalculator.iOS
+{
+    // The UIApplicationDelegate for the application. This class is responsible for launching the 
+    // User Interface of the application, as well as listening (and optionally responding) to 
+    // application events from iOS.
+    [Register("AppDelegate")]
+    public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
+    {
+        //
+        // This method is invoked when the application has loaded and is ready to run. In this 
+        // method you should instantiate the window, load the UI into it and then make the window
+        // visible.
+        //
+        // You have 17 seconds to return from this method, or iOS will terminate your application.
+        //
+        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
+        {
+            global::Xamarin.Forms.Forms.Init();
+            LoadApplication(new App());
+
+            return base.FinishedLaunching(app, options);
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator.iOS/Entitlements.plist
+++ b/RpnCalculator/RpnCalculator.iOS/Entitlements.plist
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+</dict>
+</plist>
+
--- a/RpnCalculator/RpnCalculator.iOS/Info.plist
+++ b/RpnCalculator/RpnCalculator.iOS/Info.plist
@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>UIDeviceFamily</key>
+    <array>
+      <integer>1</integer>
+      <integer>2</integer>
+    </array>
+    <key>UISupportedInterfaceOrientations</key>
+    <array>
+      <string>UIInterfaceOrientationPortrait</string>
+      <string>UIInterfaceOrientationLandscapeLeft</string>
+      <string>UIInterfaceOrientationLandscapeRight</string>
+    </array>
+    <key>UISupportedInterfaceOrientations~ipad</key>
+    <array>
+      <string>UIInterfaceOrientationPortrait</string>
+      <string>UIInterfaceOrientationPortraitUpsideDown</string>
+      <string>UIInterfaceOrientationLandscapeLeft</string>
+      <string>UIInterfaceOrientationLandscapeRight</string>
+    </array>
+    <key>MinimumOSVersion</key>
+    <string>8.0</string>
+    <key>CFBundleDisplayName</key>
+    <string>RpnCalculator</string>
+    <key>CFBundleIdentifier</key>
+    <string>com.yourcompany.RpnCalculator</string>
+    <key>CFBundleVersion</key>
+    <string>1.0</string>
+    <key>CFBundleIconFiles</key>
+    <array>
+      <string>Icon-60@2x</string>
+      <string>Icon-60@3x</string>
+      <string>Icon-76</string>
+      <string>Icon-76@2x</string>
+      <string>Default</string>
+      <string>Default@2x</string>
+      <string>Default-568h@2x</string>
+      <string>Default-Portrait</string>
+      <string>Default-Portrait@2x</string>
+      <string>Icon-Small-40</string>
+      <string>Icon-Small-40@2x</string>
+      <string>Icon-Small-40@3x</string>
+      <string>Icon-Small</string>
+      <string>Icon-Small@2x</string>
+      <string>Icon-Small@3x</string>
+    </array>
+    <key>UILaunchStoryboardName</key>
+    <string>LaunchScreen</string>
+  </dict>
+</plist>
--- a/RpnCalculator/RpnCalculator.iOS/Main.cs
+++ b/RpnCalculator/RpnCalculator.iOS/Main.cs
@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using Foundation;
+using UIKit;
+
+namespace RpnCalculator.iOS
+{
+    public class Application
+    {
+        // This is the main entry point of the application.
+        static void Main(string[] args)
+        {
+            // if you want to use a different Application Delegate class from "AppDelegate"
+            // you can specify it here.
+            UIApplication.Main(args, null, "AppDelegate");
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator.iOS/Properties/AssemblyInfo.cs
+++ b/RpnCalculator/RpnCalculator.iOS/Properties/AssemblyInfo.cs
@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("RpnCalculator.iOS")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("RpnCalculator.iOS")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("72bdc44f-c588-44f3-b6df-9aace7daafdd")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Default-568h@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Default-568h@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Default-Portrait.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Default-Portrait.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Default-Portrait@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Default-Portrait@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Default.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Default.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Default@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Default@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-60@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-60@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-60@3x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-60@3x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-76.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-76.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-76@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-76@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small-40.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small-40.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small-40@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small-40@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small-40@3x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small-40@3x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small@2x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small@2x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small@3x.png
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/Icon-Small@3x.png
--- a/RpnCalculator/RpnCalculator.iOS/Resources/LaunchScreen.storyboard
+++ b/RpnCalculator/RpnCalculator.iOS/Resources/LaunchScreen.storyboard
@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6245" systemVersion="13F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="X5k-f2-b5h">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6238"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="gAE-YM-kbH">
+            <objects>
+                <viewController id="X5k-f2-b5h" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Y8P-hJ-Z43"/>
+                        <viewControllerLayoutGuide type="bottom" id="9ZL-r4-8FZ"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="yd7-JS-zBw">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" misplaced="YES" image="Icon-60.png" translatesAutoresizingMaskIntoConstraints="NO" id="23">
+                                <rect key="frame" x="270" y="270" width="60" height="60"/>
+                                <rect key="contentStretch" x="0.0" y="0.0" width="0.0" height="0.0"/>
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="0.20392156862745098" green="0.59607843137254901" blue="0.85882352941176465" alpha="1" colorSpace="calibratedRGB"/>
+                        <constraints>
+                            <constraint firstItem="23" firstAttribute="centerY" secondItem="yd7-JS-zBw" secondAttribute="centerY" priority="1" id="39"/>
+                            <constraint firstItem="23" firstAttribute="centerX" secondItem="yd7-JS-zBw" secondAttribute="centerX" priority="1" id="41"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="XAI-xm-WK6" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="349" y="339"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="Icon-60.png" width="180" height="180"/>
+    </resources>
+</document>
--- a/RpnCalculator/RpnCalculator.iOS/RpnCalculator.iOS.csproj
+++ b/RpnCalculator/RpnCalculator.iOS/RpnCalculator.iOS.csproj
@ -0,0 +1,141 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">iPhoneSimulator</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{C0357C97-217F-4612-BAF0-B343D16131FA}</ProjectGuid>
+    <ProjectTypeGuids>{FEACFBD2-3405-455C-9665-78FE426C6842};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>RpnCalculator.iOS</RootNamespace>
+    <IPhoneResourcePrefix>Resources</IPhoneResourcePrefix>
+    <AssemblyName>RpnCalculator.iOS</AssemblyName>
+    <NuGetPackageImportStamp />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Debug</OutputPath>
+    <DefineConstants>DEBUG</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchArch>x86_64</MtouchArch>
+    <MtouchLink>None</MtouchLink>
+    <MtouchDebug>true</MtouchDebug>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchLink>None</MtouchLink>
+    <MtouchArch>x86_64</MtouchArch>
+    <ConsolePause>false</ConsolePause>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhone\Debug</OutputPath>
+    <DefineConstants>DEBUG</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchArch>ARM64</MtouchArch>
+    <CodesignKey>iPhone Developer</CodesignKey>
+    <MtouchDebug>true</MtouchDebug>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhone\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchArch>ARM64</MtouchArch>
+    <ConsolePause>false</ConsolePause>
+    <CodesignKey>iPhone Developer</CodesignKey>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Ad-Hoc|iPhone' ">
+    <DebugType>none</DebugType>
+    <Optimize>True</Optimize>
+    <OutputPath>bin\iPhone\Ad-Hoc</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>False</ConsolePause>
+    <MtouchArch>ARM64</MtouchArch>
+    <BuildIpa>True</BuildIpa>
+    <CodesignProvision>Automatic:AdHoc</CodesignProvision>
+    <CodesignKey>iPhone Distribution</CodesignKey>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'AppStore|iPhone' ">
+    <DebugType>none</DebugType>
+    <Optimize>True</Optimize>
+    <OutputPath>bin\iPhone\AppStore</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>False</ConsolePause>
+    <MtouchArch>ARM64</MtouchArch>
+    <CodesignProvision>Automatic:AppStore</CodesignProvision>
+    <CodesignKey>iPhone Distribution</CodesignKey>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="4.2.0.709249" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Main.cs" />
+    <Compile Include="AppDelegate.cs" />
+    <None Include="Entitlements.plist" />
+    <None Include="Info.plist" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <ITunesArtwork Include="iTunesArtwork" />
+    <ITunesArtwork Include="iTunesArtwork@2x" />
+  </ItemGroup>
+  <ItemGroup>
+    <BundleResource Include="Resources\Default-568h%402x.png" />
+    <BundleResource Include="Resources\Default-Portrait.png" />
+    <BundleResource Include="Resources\Default-Portrait%402x.png" />
+    <BundleResource Include="Resources\Default.png" />
+    <BundleResource Include="Resources\Default%402x.png" />
+    <BundleResource Include="Resources\Icon-60%402x.png" />
+    <BundleResource Include="Resources\Icon-60%403x.png" />
+    <BundleResource Include="Resources\Icon-76.png" />
+    <BundleResource Include="Resources\Icon-76%402x.png" />
+    <BundleResource Include="Resources\Icon-Small-40.png" />
+    <BundleResource Include="Resources\Icon-Small-40%402x.png" />
+    <BundleResource Include="Resources\Icon-Small-40%403x.png" />
+    <BundleResource Include="Resources\Icon-Small.png" />
+    <BundleResource Include="Resources\Icon-Small%402x.png" />
+    <BundleResource Include="Resources\Icon-Small%403x.png" />
+    <InterfaceDefinition Include="Resources\LaunchScreen.storyboard" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="Xamarin.iOS" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\RpnCalculator\RpnCalculator.csproj">
+      <Project>{8c293033-a36f-4eca-8277-e26732a0ef60}</Project>
+      <Name>RpnCalculator</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup />
+  </Target>
+</Project>
--- a/RpnCalculator/RpnCalculator.iOS/iTunesArtwork
+++ b/RpnCalculator/RpnCalculator.iOS/iTunesArtwork
--- a/RpnCalculator/RpnCalculator.iOS/iTunesArtwork@2x
+++ b/RpnCalculator/RpnCalculator.iOS/iTunesArtwork@2x
--- a/RpnCalculator/RpnCalculator/App.xaml
+++ b/RpnCalculator/RpnCalculator/App.xaml
@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Application xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="RpnCalculator.App">
+	<Application.Resources>
+
+		<!-- Application resource dictionary -->
+
+	</Application.Resources>
+</Application>
--- a/RpnCalculator/RpnCalculator/App.xaml.cs
+++ b/RpnCalculator/RpnCalculator/App.xaml.cs
@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
+
+namespace RpnCalculator
+{
+    public partial class App : Application
+    {
+        public App()
+        {
+            InitializeComponent();
+
+            MainPage = new RpnCalculator.MainPage();
+        }
+
+        protected override void OnStart()
+        {
+            // Handle when your app starts
+        }
+
+        protected override void OnSleep()
+        {
+            // Handle when your app sleeps
+        }
+
+        protected override void OnResume()
+        {
+            // Handle when your app resumes
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator/MainPage.xaml
+++ b/RpnCalculator/RpnCalculator/MainPage.xaml
@ -0,0 +1,499 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:RpnCalculator"
+             x:Class="RpnCalculator.MainPage">
+    <ContentPage.Padding>
+        <OnPlatform x:TypeArguments="Thickness">
+            <On Platform="iOS" Value="0, 20, 0, 0" />
+        </OnPlatform>
+    </ContentPage.Padding>
+
+    <ContentPage.BindingContext>
+        <local:RpnCalculatorViewModel />
+    </ContentPage.BindingContext>
+
+    <ContentPage.Resources>
+        <ResourceDictionary>
+            <Style TargetType="Grid">
+                <Setter Property="RowSpacing" Value="2" />
+                <Setter Property="ColumnSpacing" Value="2" />
+            </Style>
+
+            <Style TargetType="Label">
+                <Setter Property="VerticalOptions" Value="Center" />
+                <Setter Property="HorizontalTextAlignment" Value="End" />
+            </Style>
+
+            <Style TargetType="Button">
+                <Setter Property="BorderWidth" Value="1" />
+                <Setter Property="BorderColor" Value="Black" />
+            </Style>
+        </ResourceDictionary>
+    </ContentPage.Resources>
+
+    <Grid Margin="5">
+        
+        <!-- Portrait: 10 rows, 5 columns -->
+        <Grid x:Name="portrait">
+            
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+            </Grid.RowDefinitions>
+
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+            </Grid.ColumnDefinitions>
+
+            <!-- X and Y Stack Values -->
+            <Frame Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="5"
+                   Padding="0">
+                <Grid>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="*" />
+                        <RowDefinition Height="*" />
+                    </Grid.RowDefinitions>
+
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="Auto" />
+                        <ColumnDefinition Width="*" />
+                    </Grid.ColumnDefinitions>
+
+                    <Label Text="Y = " 
+                           Grid.Row="0" Grid.Column="0" />
+
+                    <Label Text="{Binding YStackValue}"
+                           Grid.Row="0" Grid.Column="1" />
+
+                    <Label Text="X = " 
+                           Grid.Row="1" Grid.Column="0" />
+
+                    <Label Text="{Binding XStackValue}"
+                           Grid.Row="1" Grid.Column="1" />
+                </Grid>
+            </Frame>
+
+            <Frame Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="5"
+                   Padding="0">
+                <Label Text="{Binding Entry}"
+                       FontSize="Large" />
+            </Frame>
+
+            <!-- Operations --> 
+            <Button Text="y&#x1D61;"
+                    Grid.Row="2" Grid.Column="0"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="pow" />
+            
+            <Button Text="sin" 
+                    Grid.Row="2" Grid.Column="1"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="sin" />
+
+            <Button Text="cos" 
+                    Grid.Row="2" Grid.Column="2"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="cos" />
+        
+            <Button Text="tan" 
+                    Grid.Row="2" Grid.Column="3"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="tan" />
+
+            <Button Text="rad" 
+                    Grid.Row="2" Grid.Column="4"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="radians" />
+
+            <Button Text="log"
+                    Grid.Row="3" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="log10" />
+
+            <Button Text="asin" 
+                    Grid.Row="3" Grid.Column="1"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="asin" />
+
+            <Button Text="acos" 
+                    Grid.Row="3" Grid.Column="2"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="acos" />
+
+            <Button Text="atan" 
+                    Grid.Row="3" Grid.Column="3"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="atan" />
+
+            <Button Text="deg" 
+                    Grid.Row="3" Grid.Column="4"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="degrees" />
+
+            <Button Text="ln"
+                    Grid.Row="4" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="log" />
+            
+            <Button Text="e&#x1D61;"
+                    Grid.Row="5" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="exp" />
+
+            <Button Text="&#x221A;"
+                    Grid.Row="6" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="sqrt" />
+
+            <Button Text="1/x"
+                    Grid.Row="7" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="invert" />
+
+            <Button Text="+/&#x2013;"
+                    Grid.Row="8" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="negate" />
+
+            <Button Text="x&#x21D4;y"
+                    Grid.Row="9" Grid.Column="0"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="swap" />
+
+            <!-- Numeric Keypad -->
+            <Button Text="C"
+                    Grid.Row="4" Grid.Column="1"
+                    Command="{Binding ClearCommand}" />
+
+            <Button Text="CE"
+                    Grid.Row="4" Grid.Column="2"
+                    Command="{Binding ClearEntryCommand}" />
+
+            <Button Text="&#x21E6;"
+                    Grid.Row="4" Grid.Column="3" Grid.ColumnSpan="2"
+                    Command="{Binding BackspaceCommand}" />
+
+            <Button Text="7" 
+                    Grid.Row="5" Grid.Column="1"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="7" />
+
+            <Button Text="8" 
+                    Grid.Row="5" Grid.Column="2"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="8" />
+
+            <Button Text="9" 
+                    Grid.Row="5" Grid.Column="3"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="9" />
+
+            <Button Text="/" 
+                    Grid.Row="5" Grid.Column="4"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="divide" />
+
+            <Button Text="4" 
+                    Grid.Row="6" Grid.Column="1"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="4" />
+
+            <Button Text="5" 
+                    Grid.Row="6" Grid.Column="2"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="5" />
+
+            <Button Text="6" 
+                    Grid.Row="6" Grid.Column="3"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="6" />
+
+            <Button Text="&#x00D7;" 
+                    Grid.Row="6" Grid.Column="4"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="multiply" />
+
+            <Button Text="1" 
+                    Grid.Row="7" Grid.Column="1"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="1" />
+
+            <Button Text="2" 
+                    Grid.Row="7" Grid.Column="2"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="2" />
+
+            <Button Text="3" 
+                    Grid.Row="7" Grid.Column="3"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="3" />
+
+            <Button Text="&#x2013;" 
+                    Grid.Row="7" Grid.Column="4"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="subtract" />
+
+            <Button Text="0" 
+                    Grid.Row="8" Grid.Column="1" Grid.ColumnSpan="2"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="0" />
+
+            <Button Text="&#x00B7;" 
+                    Grid.Row="8" Grid.Column="3"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="." />
+
+            <Button Text="+" 
+                    Grid.Row="8" Grid.Column="4"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="add" />
+            
+            <Button Text="ENTER" 
+                    Grid.Row="9" Grid.Column="1" Grid.ColumnSpan="4"
+                    Command="{Binding EnterCommand}" />
+        </Grid>
+
+        <!-- Landscape: 6 rows, 8 columns -->
+        <Grid x:Name="landscape">
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+                <RowDefinition Height="*" />
+            </Grid.RowDefinitions>
+
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="*" />
+            </Grid.ColumnDefinitions>
+
+            <!-- X and Y Stack Values -->
+            <Frame Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="4"
+                   Padding="0">
+                <Grid>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="*" />
+                        <RowDefinition Height="*" />
+                    </Grid.RowDefinitions>
+
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="Auto" />
+                        <ColumnDefinition Width="*" />
+                    </Grid.ColumnDefinitions>
+
+                    <Label Text="Y = " 
+                           Grid.Row="0" Grid.Column="0" />
+
+                    <Label Text="{Binding YStackValue}"
+                           Grid.Row="0" Grid.Column="1" />
+
+                    <Label Text="X = " 
+                           Grid.Row="1" Grid.Column="0" />
+
+                    <Label Text="{Binding XStackValue}"
+                           Grid.Row="1" Grid.Column="1" />
+                </Grid>
+            </Frame>
+
+            <Frame Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="4"
+                   Padding="0">
+                <Label Text="{Binding Entry}"
+                       FontSize="Large" />
+            </Frame>
+            
+            <!-- Operations -->
+            <Button Text="y&#x1D61;"
+                    Grid.Row="2" Grid.Column="0"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="pow" />
+
+            <Button Text="log"
+                    Grid.Row="2" Grid.Column="1"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="log10" />
+
+            <Button Text="ln"
+                    Grid.Row="2" Grid.Column="2"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="log" />
+
+            <Button Text="e&#x1D61;"
+                    Grid.Row="2" Grid.Column="3"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="exp" />
+
+            <Button Text="&#x221A;"
+                    Grid.Row="3" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="sqrt" />
+
+            <Button Text="sin"
+                    Grid.Row="3" Grid.Column="1"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="sin" />
+
+            <Button Text="cos"
+                    Grid.Row="3" Grid.Column="2"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="cos" />
+
+            <Button Text="tan"
+                    Grid.Row="3" Grid.Column="3"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="tan" />
+
+            <Button Text="1/x"
+                    Grid.Row="4" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="invert" />
+
+            <Button Text="asin"
+                    Grid.Row="4" Grid.Column="1"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="asin" />
+
+            <Button Text="acos"
+                    Grid.Row="4" Grid.Column="2"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="acos" />
+
+            <Button Text="atan"
+                    Grid.Row="4" Grid.Column="3"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="atan" />
+
+            <Button Text="+/&#x2013;"
+                    Grid.Row="5" Grid.Column="0"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="negate" />
+
+            <Button Text="x&#x21D4;y"
+                    Grid.Row="5" Grid.Column="1"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="swap" />
+
+            <Button Text="rad"
+                    Grid.Row="5" Grid.Column="2"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="radians" />
+
+            <Button Text="deg"
+                    Grid.Row="5" Grid.Column="3"
+                    Command="{Binding UnaryOperation}"
+                    CommandParameter="degrees" />
+
+            <!-- Numeric Keypad -->
+            <Button Text="C"
+                    Grid.Row="0" Grid.Column="4"
+                    Command="{Binding ClearCommand}" />
+
+            <Button Text="CE"
+                    Grid.Row="0" Grid.Column="5"
+                    Command="{Binding ClearEntryCommand}" />
+
+            <Button Text="&#x21E6;"
+                    Grid.Row="0" Grid.Column="6" Grid.ColumnSpan="2"
+                    Command="{Binding BackspaceCommand}" />
+
+            <Button Text="7" 
+                    Grid.Row="1" Grid.Column="4"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="7" />
+
+            <Button Text="8" 
+                    Grid.Row="1" Grid.Column="5"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="8" />
+
+            <Button Text="9" 
+                    Grid.Row="1" Grid.Column="6"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="9" />
+
+            <Button Text="/" 
+                    Grid.Row="1" Grid.Column="7"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="divide" />
+
+            <Button Text="4" 
+                    Grid.Row="2" Grid.Column="4"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="4" />
+
+            <Button Text="5" 
+                    Grid.Row="2" Grid.Column="5"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="5" />
+
+            <Button Text="6" 
+                    Grid.Row="2" Grid.Column="6"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="6" />
+
+            <Button Text="&#x00D7;" 
+                    Grid.Row="2" Grid.Column="7"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="multiply" />
+
+            <Button Text="1" 
+                    Grid.Row="3" Grid.Column="4"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="1" />
+
+            <Button Text="2" 
+                    Grid.Row="3" Grid.Column="5"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="2" />
+
+            <Button Text="3" 
+                    Grid.Row="3" Grid.Column="6"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="3" />
+
+            <Button Text="&#x2013;" 
+                    Grid.Row="3" Grid.Column="7"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="subtract" />
+
+            <Button Text="0" 
+                    Grid.Row="4" Grid.Column="4" Grid.ColumnSpan="2"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="0" />
+
+            <Button Text="&#x00B7;" 
+                    Grid.Row="4" Grid.Column="6"
+                    Command="{Binding DigitCommand}"
+                    CommandParameter="." />
+
+            <Button Text="+" 
+                    Grid.Row="4" Grid.Column="7"
+                    Command="{Binding BinaryOperation}"
+                    CommandParameter="add" />
+
+            <Button Text="ENTER" 
+                    Grid.Row="5" Grid.Column="4" Grid.ColumnSpan="4"
+                    Command="{Binding EnterCommand}" />
+        </Grid>
+    </Grid>
+</ContentPage>
--- a/RpnCalculator/RpnCalculator/MainPage.xaml.cs
+++ b/RpnCalculator/RpnCalculator/MainPage.xaml.cs
@ -0,0 +1,15 @@
+using System;
+using Xamarin.Forms;
+
+namespace RpnCalculator
+{
+    public partial class MainPage : ContentPage
+    {
+        public MainPage()
+        {
+            InitializeComponent();
+
+            SizeChanged += (sender, args) => portrait.IsVisible = !(landscape.IsVisible = Width > Height);
+        }
+    }
+}
--- a/RpnCalculator/RpnCalculator/RpnCalculator.csproj
+++ b/RpnCalculator/RpnCalculator/RpnCalculator.csproj
@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugType>portable</DebugType>
+    <DebugSymbols>true</DebugSymbols>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="4.2.0.709249" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="MainPage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Update="App.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+  </ItemGroup>
+
+</Project>
--- a/RpnCalculator/RpnCalculator/RpnCalculatorViewModel.cs
+++ b/RpnCalculator/RpnCalculator/RpnCalculatorViewModel.cs
@ -0,0 +1,204 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Windows.Input;
+using Xamarin.Forms;
+
+namespace RpnCalculator
+{
+    public class RpnCalculatorViewModel : INotifyPropertyChanged
+    {
+        string entry = "0";
+        Stack<double> stack = new Stack<double>();
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        public RpnCalculatorViewModel()
+        {
+            ClearCommand = new Command(
+                execute: () =>
+                {
+                    stack.Clear();
+                    Entry = "0";
+                    RefreshCanExecutes();
+                    RefreshStackDisplay();
+                });
+
+            ClearEntryCommand = new Command(
+                execute: () =>
+                {
+                    Entry = "0";
+                    RefreshCanExecutes();
+                });
+
+            BackspaceCommand = new Command(
+                execute: () =>
+                {
+                    Entry = Entry.Substring(0, Entry.Length - 1);
+                    if (Entry == "")
+                    {
+                        Entry = "0";
+                    }
+                    RefreshCanExecutes();
+                },
+                canExecute: () =>
+                {
+                    return Entry.Length > 1 || Entry != "0";
+                });
+
+            DigitCommand = new Command<string>(
+                execute: (string arg) =>
+                {
+                    Entry += arg;
+                    if (Entry.StartsWith("0") && !Entry.StartsWith("0."))
+                    {
+                        Entry = Entry.Substring(1);
+                    }
+                    RefreshCanExecutes();
+                },
+                canExecute: (string arg) =>
+                {
+                    return !(arg == "." && Entry.Contains("."));
+                });
+
+            EnterCommand = new Command(
+                execute: () =>
+                {
+                    stack.Push(double.Parse(Entry));
+                    Entry = "0";
+                    RefreshStackDisplay();
+                    RefreshCanExecutes();
+                });
+
+            UnaryOperation = new Command<string>(
+                (string op) =>
+                {
+                    double arg = stack.Pop();
+                    double result = 0;
+
+                    switch (op)
+                    {
+                        case "log10": result = Math.Log10(arg); break;
+                        case "log": result = Math.Log(arg); break;
+                        case "exp": result = Math.Exp(arg); break;
+                        case "sqrt": result = Math.Sqrt(arg); break;
+                        case "sin": result = Math.Sin(arg); break;
+                        case "cos": result = Math.Cos(arg); break;
+                        case "tan": result = Math.Tan(arg); break;
+                        case "invert": result = 1 / arg; break;
+                        case "asin": result = Math.Asin(arg); break;
+                        case "acos": result = Math.Acos(arg); break;
+                        case "atan": result = Math.Atan(arg); break;
+                        case "negate": result = -arg; break;
+                        case "radians": result = Math.PI * arg / 180; break;
+                        case "degrees": result = 180 * arg / Math.PI; break;
+                    }
+
+                    stack.Push(result);
+                    RefreshStackDisplay();
+                },
+                (string op) =>
+                {
+                    return stack.Count > 0;
+                });
+
+            BinaryOperation = new Command<string>(
+                execute: (string op) =>
+                {
+                    double x = stack.Pop();
+                    double y = stack.Pop();
+                    double result = 0;
+
+                    switch (op)
+                    {
+                        case "divide": result = y / x; break;
+                        case "multiply": result = y * x; break;
+                        case "subtract": result = y - x; break;
+                        case "add": result = y + x; break;
+                        case "pow": result = Math.Pow(y, x); break;
+                        case "swap": stack.Push(x); result = y; break;
+                    }
+
+                    stack.Push(result);
+                    RefreshCanExecutes();
+                    RefreshStackDisplay();
+                },
+                canExecute: (string op) =>
+                {
+                    return stack.Count > 1;
+                });
+        }
+
+        void RefreshCanExecutes()
+        {
+            ((Command)BackspaceCommand).ChangeCanExecute();
+            ((Command)DigitCommand).ChangeCanExecute();
+            ((Command)UnaryOperation).ChangeCanExecute();
+            ((Command)BinaryOperation).ChangeCanExecute();
+        }
+
+        void RefreshStackDisplay()
+        {
+            OnPropertyChanged("XStackValue");
+            OnPropertyChanged("YStackValue");
+        }
+
+        public string Entry
+        {
+            private set { SetProperty(ref entry, value); }
+            get { return entry; }
+        }
+
+        public string XStackValue
+        {
+            get { return stack.Count > 0 ? stack.Peek().ToString() : ""; }
+        }
+
+        public string YStackValue
+        {
+            get
+            {
+                string result = "";
+
+                if (stack.Count > 1)
+                {
+                    double hold = stack.Pop();
+                    result = stack.Peek().ToString();
+                    stack.Push(hold);
+                }
+
+                return result;
+            }
+        }
+
+        public ICommand ClearCommand { private set; get; }
+
+        public ICommand ClearEntryCommand { private set; get; }
+
+        public ICommand BackspaceCommand { private set; get; }
+
+        public ICommand DigitCommand { private set; get; }
+
+        public ICommand EnterCommand { private set; get; }
+
+        public ICommand UnaryOperation { private set; get; }
+
+        public ICommand BinaryOperation { private set; get; }
+
+        bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
+        {
+            if (Object.Equals(storage, value))
+                return false;
+
+            storage = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+
+        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}
--- a/Screenshots/01Portrait.a.png
+++ b/Screenshots/01Portrait.a.png
--- a/Screenshots/01Portrait.i.png
+++ b/Screenshots/01Portrait.i.png
--- a/Screenshots/01Portrait.png
+++ b/Screenshots/01Portrait.png
--- a/Screenshots/01Portrait.u.png
+++ b/Screenshots/01Portrait.u.png
--- a/Screenshots/02Landscape.a.png
+++ b/Screenshots/02Landscape.a.png
--- a/Показать больше
+++ b/Показать больше