LDA and RobustGaussianProcess support .NET Core (#286)

* Add more generated files to exclusion list
* RobustGaussianProcess uses OxyPlot.Wpf only on Windows

Co-authored-by: Tom Minka <8955276+tminka@users.noreply.github.com>

.gitignore

@@ -260,3 +260,6 @@ _site/
 
 **/GeneratedSource
 **/__pycache__
+*.png
+/src/Examples/Crowdsourcing/Results
+/src/Examples/ImageClassifier/Images/Features.txt

src/Examples/LDA/LDA.csproj

@@ -53,6 +53,10 @@
     <ProjectReference Include="..\..\Runtime\Runtime.csproj" />
   </ItemGroup>
   
+  <ItemGroup>
+    <PackageReference Include="System.Diagnostics.PerformanceCounter" Version="4.7.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Include="..\..\Shared\SharedAssemblyFileVersion.cs" />
     <Compile Include="..\..\Shared\SharedAssemblyInfo.cs" />

src/Examples/LDA/Program.cs

@@ -151,20 +151,16 @@ namespace LDAExample
             // Train the model - we will also get rough estimates of execution time and memory
             Dirichlet[] postTheta, postPhi;
             GC.Collect();
-#if NETFULL
             PerformanceCounter memCounter = new PerformanceCounter("Memory", "Available MBytes");
             float preMem = memCounter.NextValue();
-#endif
             stopWatch.Reset();
             stopWatch.Start();
             double logEvidence = model.Infer(trainWordsInTrainDoc, alpha, beta, out postTheta, out postPhi);
             stopWatch.Stop();
-#if NETFULL
             float postMem = memCounter.NextValue();
             double approxMB = preMem - postMem;
             GC.KeepAlive(model); // Keep the model alive to this point (for the memory counter)
             Console.WriteLine(String.Format("Approximate memory usage: {0:F2} MB", approxMB));
-#endif
             Console.WriteLine(String.Format("Approximate execution time (including model compilation): {0} seconds", stopWatch.ElapsedMilliseconds / 1000));
 
             // Calculate average log evidence over total training words

src/Examples/RobustGaussianProcess/Program.cs

@@ -57,8 +57,7 @@ namespace RobustGaussianProcess
 
                 // Infer the posterior Sparse GP
                 SparseGP sgp = engine.Infer<SparseGP>(gaussianProcessRegressor.F);
-
+#if WINDOWS
-#if NETFULL
                 string datasetName = useSynthetic ? "Synthetic" : "AIS";
                 Utilities.PlotPredictions(sgp, trainingInputs, trainingOutputs, useStudentTLikelihood, datasetName);
 #endif

src/Examples/RobustGaussianProcess/RobustGaussianProcess.csproj

@@ -7,6 +7,10 @@
     <Prefer32Bit>false</Prefer32Bit>
     <DefineConstants>TRACE</DefineConstants>
     <Configurations>Debug;Release;DebugFull;DebugCore;ReleaseFull;ReleaseCore</Configurations>
+    <IsWindows Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Windows)))' == 'true'">true</IsWindows>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(IsWindows)'=='true'">
+    <DefineConstants>WINDOWS</DefineConstants>
   </PropertyGroup>
   <Choose>
     <When Condition="'$(Configuration)'=='DebugFull' OR '$(Configuration)'=='ReleaseFull'">
@@ -26,14 +30,6 @@
     </Otherwise>
   </Choose>
 
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.1'">
-    <DefineConstants>$(DefineConstants);NETCORE;NETSTANDARD;NETSTANDARD2_0</DefineConstants>
-  </PropertyGroup>
-
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'net461'">
-    <DefineConstants>$(DefineConstants);NETFULL</DefineConstants>
-  </PropertyGroup>
-
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU' OR '$(Configuration)|$(Platform)'=='DebugFull|AnyCPU' OR '$(Configuration)|$(Platform)'=='DebugCore|AnyCPU'">
     <DebugSymbols>true</DebugSymbols>
     <DebugType>full</DebugType>
@@ -64,8 +60,8 @@
     <Compile Include="..\..\Shared\SharedAssemblyInfo.cs" />
   </ItemGroup>
 
-  <ItemGroup Condition="$(DefineConstants.Contains('NETFULL'))">
+  <ItemGroup Condition="'$(IsWindows)'=='true'">
-    <PackageReference Include="OxyPlot.Wpf" Version="1.0.0" />
+    <PackageReference Include="OxyPlot.Wpf" Version="2.0.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Examples/RobustGaussianProcess/Utilities.cs

@@ -9,7 +9,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 
-#if NETFULL
+#if WINDOWS
 using OxyPlot.Wpf;
 using OxyPlot;
 using System.Threading;
@@ -113,7 +113,7 @@ namespace RobustGaussianProcess
             return engine;
         }
 
-#if NETFULL
+#if WINDOWS
         public static void PlotGraph(PlotModel model, string graphPath)
         {
             // Required for plotting