Unable to build TiledPluginCore on NetStandard branch

[patridge]

As of commit 27da7c8, I was getting a build error when building the solution of Glue with All.sln from source.

Error    CS0579    Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' attribute    TiledPluginCore    C:\dev\FlatRedBall\FRBDK\Glue\TileGraphicsPlugin\TileGraphicsPlugin\obj\x86\Debug\netcoreapp3.0.NETCoreApp,Version=v3.0.AssemblyAttributes.cs    4    Active

In chat, it was thought that I was missing the .NET Core version 3.0.1. I ran the installer and it said it was already there, so I tried repairing the install without any luck. Not sure if it's one that even shows up in the dotnet list, but listing all my installed .NET Core SDKs doesn't show that specific version.

> dotnet --list-sdks
3.1.301 [C:\Program Files\dotnet\sdk]
3.1.407 [C:\Program Files\dotnet\sdk]
5.0.100 [C:\Program Files\dotnet\sdk]
5.0.103 [C:\Program Files\dotnet\sdk]
5.0.104 [C:\Program Files\dotnet\sdk]
5.0.201 [C:\Program Files\dotnet\sdk]

Workaround

It remains to be seen if there are other issues caused by this workaround, but I was able to get the project (and full solution) to build after adding this line to the TilePluginCore.csproj file.

<PropertyGroup>
  <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
  <GenerateTargetFrameworkAttribute>false</GenerateTargetFrameworkAttribute><!-- added this -->
  <Platforms>AnyCPU;x86</Platforms>
</PropertyGroup>

[patridge]

[Edit: no longer an problem related to this issue.]

Possible that the .NET Core 3.0.1 installer just can't do what it wants. I got this when I tried to play a project in Glue.

Could not find msbuild.exe. Looked in the following locations:
C:/dev/FlatRedBall/FRBDK/Glue/Glue/bin/x86/Debug/netcoreapp3.0/Tools/MSBuild/15.0/MSBuild.exe
C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/MSBuild.exe
C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/amd64/MSBuild.exe
C:/Program Files (x86)/Microsoft Visual Studio/2017/BuildTools/MSBuild/15.0/Bin/MSBuild.exe
C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/MSBuild/15.0/Bin/MSBuild.exe
C:/Program Files (x86)/MSBuild/14.0/Bin/MSBuild.exe

[patridge]

If I build projects in VS2019 that fail in Glue with the above msbuild.exe error, they seem to build and run fine.

[patridge]

In my latest attempts, I no longer have the msbuild.exe errors. I still require adding the csproj element.

[vchelaru]

I believe both issues are solved now.