Fix netcoreapp3.0 builds (#2359)

* Fix netcoreapp3.0 builds for real

* Use same nuget package versions for all targets.

* Add comment

* Fix tests.

Author: timcassell

src/BenchmarkDotNet/BenchmarkDotNet.csproj

@@ -24,19 +24,16 @@
     <PackageReference Include="Perfolizer" Version="[0.2.1]" />
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="3.0.2" PrivateAssets="contentfiles;analyzers" />
     <PackageReference Include="Microsoft.DotNet.PlatformAbstractions" Version="3.1.6" />
+    <!-- Do not update these packages, or else netcoreapp3.0 and older will no longer work -->
+    <PackageReference Include="System.Management" Version="5.0.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.1.0" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />
     <PackageReference Include="System.Numerics.Vectors" Version="4.5.0" />
     <PackageReference Include="System.Reflection.Emit" Version="4.7.0" />
     <PackageReference Include="System.Reflection.Emit.Lightweight" Version="4.7.0" />
     <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
-    <PackageReference Include="System.Management" Version="5.0.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.2.0" />
-  </ItemGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'net6.0' ">
-    <PackageReference Include="System.Management" Version="6.0.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup Condition="'$(OS)' == 'Windows_NT' AND '$(UseMonoRuntime)' != 'true' ">
     <ProjectReference Include="..\BenchmarkDotNet.Disassembler.x64\BenchmarkDotNet.Disassembler.x64.csproj">

tests/BenchmarkDotNet.IntegrationTests.ConfigPerAssembly/BenchmarkDotNet.IntegrationTests.ConfigPerAssembly.csproj

@@ -14,7 +14,7 @@
     <ProjectReference Include="..\..\src\BenchmarkDotNet\BenchmarkDotNet.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <Reference Include="System.Runtime" />
   </ItemGroup>
 </Project>

tests/BenchmarkDotNet.IntegrationTests.CustomPaths/BenchmarkDotNet.IntegrationTests.CustomPaths.csproj

@@ -14,7 +14,7 @@
     <ProjectReference Include="..\..\src\BenchmarkDotNet\BenchmarkDotNet.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <Reference Include="System.Runtime" />
   </ItemGroup>
 

tests/BenchmarkDotNet.IntegrationTests.DisabledOptimizations/BenchmarkDotNet.IntegrationTests.DisabledOptimizations.csproj

@@ -16,7 +16,7 @@
     <ProjectReference Include="..\..\src\BenchmarkDotNet\BenchmarkDotNet.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <Reference Include="System.Runtime" />
   </ItemGroup>
 </Project>

tests/BenchmarkDotNet.IntegrationTests.EnabledOptimizations/BenchmarkDotNet.IntegrationTests.EnabledOptimizations.csproj

@@ -16,7 +16,7 @@
     <ProjectReference Include="..\..\src\BenchmarkDotNet\BenchmarkDotNet.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <Reference Include="System.Runtime" />
   </ItemGroup>
 </Project>

tests/BenchmarkDotNet.IntegrationTests.Static/BenchmarkDotNet.IntegrationTests.Static.csproj

@@ -14,7 +14,7 @@
     <ProjectReference Include="..\..\src\BenchmarkDotNet\BenchmarkDotNet.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <Reference Include="System.Runtime" />
   </ItemGroup>
 </Project>

tests/BenchmarkDotNet.IntegrationTests/BenchmarkDotNet.IntegrationTests.csproj

@@ -46,7 +46,7 @@
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
     <ProjectReference Include="..\..\src\BenchmarkDotNet.Diagnostics.Windows\BenchmarkDotNet.Diagnostics.Windows.csproj" />
     <ProjectReference Include="..\BenchmarkDotNet.IntegrationTests.CustomPaths\BenchmarkDotNet.IntegrationTests.CustomPaths.csproj" />
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
     <Reference Include="System.Configuration" />
     <Reference Include="System.Runtime" />

tests/BenchmarkDotNet.Tests/BenchmarkDotNet.Tests.csproj

@@ -25,7 +25,7 @@
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
     <ProjectReference Include="..\..\src\BenchmarkDotNet.Diagnostics.Windows\BenchmarkDotNet.Diagnostics.Windows.csproj" />
-    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="5.0.0" />
     <PackageReference Include="System.Memory" Version="4.5.5" />
     <Reference Include="System.Runtime" />
     <Reference Include="System.Threading.Tasks" />