[.NET] Update to .NET 5 (#6466)

Fixes #6455

Author: paulcam206

source/dotnet/Samples/AdaptiveCards.Sample.Html/AdaptiveCards.Sample.Html.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo Condition="$(Tfs_PackageVersionNumber) != ''">false</GenerateAssemblyInfo>
   </PropertyGroup>
 

source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject.wapproj

@@ -3,6 +3,9 @@
   <PropertyGroup Condition="'$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '15.0'">
     <VisualStudioVersion>15.0</VisualStudioVersion>
   </PropertyGroup>
+  <PropertyGroup>
+    <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
+  </PropertyGroup>
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|x86">
       <Configuration>Debug</Configuration>
@@ -73,4 +76,4 @@
     <ProjectReference Include="..\WPFVisualizer\AdaptiveCards.Sample.WPFVisualizer.csproj" />
   </ItemGroup>
   <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.targets" />
-</Project>
+</Project>

source/dotnet/Samples/WPFVisualizer/AdaptiveCards.Sample.WPFVisualizer.csproj

@@ -10,6 +10,7 @@
     <RootNamespace>WpfVisualizer</RootNamespace>
     <AssemblyName>WpfVisualizer</AssemblyName>
     <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <RuntimeIdentifier>win</RuntimeIdentifier>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <WarningLevel>4</WarningLevel>

source/dotnet/Test/AdaptiveCards.Rendering.Html.Test/AdaptiveCards.Rendering.Html.Test.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo Condition="$(Tfs_PackageVersionNumber) != ''">false</GenerateAssemblyInfo>
   </PropertyGroup>
 

source/dotnet/Test/AdaptiveCards.Templating.Test/AdaptiveCards.Templating.Test.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>

source/dotnet/Test/AdaptiveCards.Test/AdaptiveCards.Test.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo Condition="$(Tfs_PackageVersionNumber) != ''">false</GenerateAssemblyInfo>
     <IsPackable>false</IsPackable>
   </PropertyGroup>