add a prototype webview2 boostrapper click once prerequisite

WebViewRuntimePrototype/en/package.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<!--
+***********************************************************************
+ 
+  Copyright (C) Microsoft Corporation.  All rights reserved.
+ 
+ THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY
+ KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
+ PARTICULAR PURPOSE.
+***********************************************************************
+-->
+
+<Package 
+  xmlns="http://schemas.microsoft.com/developer/2004/01/bootstrapper"
+  Name="DisplayName"
+  Culture="Culture"
+  LicenseAgreement="placeholdereula.txt">
+  <PackageFiles>
+    <PackageFile Name="placeholdereula.txt"/>
+  </PackageFiles>
+
+  <!-- Defines a localizable string table for messages. -->
+  <Strings>
+    <String Name="DisplayName">Edge WebView runtime bootstrapper</String>
+    <String Name="Culture">en</String>
+    <String Name="AdminRequired">Administrator permissions are required to install the Microsoft Edge WebView runtime. Contact your administrator.</String>
+    <String Name="GeneralFailure">A failure occurred attempting to install the Microsoft Edge WebView runtime.</String>
+    <String Name="WebViewRuntime">http://go.microsoft.com/fwlink/p/?LinkId=2124703</String>
+  </Strings>
+</Package>

WebViewRuntimePrototype/en/placeholdereula.txt

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+This is a placeholder for the shipping EULA.
+
+This is only for prototype work and MUST be replaced with final EULA before shipping product.

WebViewRuntimePrototype/product.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<!--
+***********************************************************************
+ 
+  Copyright (C) Microsoft Corporation.  All rights reserved.
+ 
+ THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY
+ KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
+ PARTICULAR PURPOSE.
+***********************************************************************
+-->
+
+<Product 
+  xmlns="http://schemas.microsoft.com/developer/2004/01/bootstrapper" 
+  ProductCode="Microsoft.EdgeRuntime">
+
+  <!-- Defines the list of files to be copied on build. -->
+  <PackageFiles CopyAllPackageFiles="false">
+    <PackageFile Name="MicrosoftEdgeWebview2Setup.exe" HomeSite="WebViewRuntime" PublicKey="0"/>
+  </PackageFiles>
+
+  <InstallChecks>
+    <RegistryCheck Property="EdgeRuntimeVersionInstalled" Key="HKLM\SOFTWARE\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" Value="pv"/>
+  </InstallChecks>
+
+  <!-- Defines how to run the Setup package. -->
+  <Commands Reboot="Defer">
+    <Command 
+      PackageFile="MicrosoftEdgeWebview2Setup.exe" 
+      Arguments=" /silent /installelevated /install" 
+      EstimatedInstalledBytes="2600000" 
+      EstimatedTempBytes="4500000"
+      EstimatedInstallSeconds="60">
+      <InstallConditions>
+        <BypassIf Property="EdgeRuntimeVersionInstalled" Compare="VersionGreaterThanOrEqualTo" Value="86.0.622.15"/>
+      </InstallConditions>
+      <ExitCodes>
+        <ExitCode Value="0" Result="Success"/>
+        <DefaultExitCode Result="Fail" FormatMessageFromSystem="true" String="GeneralFailure" />
+      </ExitCodes>
+    </Command>
+  </Commands>
+</Product>

WebViewRuntimePrototype/readme.md

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+Title
+===
+WebView2 Boostrapper prerequisite prototype
+
+# Description
+This is a set of files that prototypes the usage of a WebView2 prerequisite component to be shipped as part of Visual Studio in a later release.  This can then be used
+by vistual studio click once projects to find the boostrapper component sources.
+
+# Whats in this
+The files should be:
+
+| File | Description |
+| ------------- | -------------------------------------------------------- |
+| \product.xml | A descriptive block covering what the prerequisite is for |
+| \en\package.xml | Block containing file information for the eula |
+| \en\placeholdereula.txt | A placeholder eula for this prototype |
+| | |
+| \prerequisiteprototype.reg | a sample reg file for configuration |
+| \readme.md | this readme file |
+
+# Installation
+Put the files on your development machine under a bootstrapper\prerequisite folder.  
+IE:
+e:\boostreapper\prerequisite\webviewruntimeprototype
+
+Create a reg key named:
+HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\GenericBootstrapper\AdditionalPackagePaths
+
+With a REG_SZ key under it:
+WebView2Runtime  value = the path you used above (minus the webviewruntimeprototype portion)
+IE: 
+E:\boostrapper\prerequisite
+
+
+Now when the click once project presents the list of prerequisites available the webviewruntime will show up.
+
+