Switched build pipeline back to windows-latest (#392)

- Changed vmImage to `windows-latest`
- Referenced Microsoft.NETFramework.ReferenceAssemblies`
- Removed `FrameworkPathOverride`
- Removed `AutomaticallyUseReferenceAssemblyPackages`

.pipelines/build.yml

@@ -7,7 +7,7 @@ trigger:
     - '*.md'
 
 pool:
-  vmImage: windows-2019
+  vmImage: windows-latest
 
 variables:
   solution: 'JWT.sln'

src/JWT/JWT.csproj

@@ -4,10 +4,6 @@
     <TargetFrameworks>netstandard1.3;netstandard2.0;net6.0;net35;net40;net46;</TargetFrameworks>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(TargetFramework)' == 'net35'">
-    <FrameworkPathOverride>$(MSBuildProgramFiles32)\Reference Assemblies\Microsoft\Framework\.NETFramework\v3.5\Profile\Client</FrameworkPathOverride>
-    <AutomaticallyUseReferenceAssemblyPackages>false</AutomaticallyUseReferenceAssemblyPackages>
-  </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'net35' OR '$(TargetFramework)' == 'net40' OR '$(TargetFramework)' == 'net46'">
     <TargetFrameworkIdentifier>.NETFramework</TargetFrameworkIdentifier>
   </PropertyGroup>
@@ -51,5 +47,11 @@
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Security.Cryptography.Csp" Version="4.3.0" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net35'">
+    <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
 
 </Project>