Added net472 as target framework

Author: Dresel

src/SpatialFocus.MethodCache.Sample.Library/SpatialFocus.MethodCache.Sample.Library.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>netstandard2.0</TargetFramework>
+		<TargetFrameworks>net472;netstandard2.0</TargetFrameworks>
 	</PropertyGroup>
 
 	<ItemGroup>

src/SpatialFocus.MethodCache.SmokeTest/SpatialFocus.MethodCache.SmokeTest.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>netstandard2.0</TargetFramework>
+		<TargetFrameworks>net472;netstandard2.0</TargetFrameworks>
 		<IsPackable>false</IsPackable>
 	</PropertyGroup>
 

src/SpatialFocus.MethodCache.TestAssembly/SpatialFocus.MethodCache.TestAssembly.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>netstandard2.0</TargetFramework>
+		<TargetFrameworks>net472;netstandard2.0</TargetFrameworks>
 		<DisableFody>true</DisableFody>
 	</PropertyGroup>
 

src/SpatialFocus.MethodCache.Tests/SpatialFocus.MethodCache.Tests.csproj

@@ -1,8 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+		<TargetFrameworks>net472;netcoreapp3.1</TargetFrameworks>
 		<DisableFody>true</DisableFody>
+		<LangVersion>8.0</LangVersion>
 	</PropertyGroup>
 
 	<ItemGroup>
@@ -13,6 +14,7 @@
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
+		<Reference Include="Microsoft.CSharp" />
 	</ItemGroup>
 
 	<ItemGroup>

src/SpatialFocus.MethodCache/SpatialFocus.MethodCache.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>netstandard2.0</TargetFramework>
+		<TargetFrameworks>net472;netstandard2.0</TargetFrameworks>
 		<Version>1.0.0-alpha1</Version>
 		<Title>A method caching Fody addin.</Title>
 		<Authors>Dresel,pergerch</Authors>