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I am trying to migrate my website from dotnet core rc1 to dotnet core rc2, but I faced an error, then I tried to run a small test and it also didn't work for me. This is my teste: https://github.com/ricardoalcantara/WebApplicationBasic

My environment is:

  • Debian 8.4
  • Mono 4.2.3
  • dotnet 1.0.0-preview1-002702

I need to run it on top of the "framework": "net451" because my main project needs few libs which still just run on that platform, so I am running with this command line:

dotnet run --framework .NETFramework,Version=v4.5.1

it actually runs, but when I try to access localhost:5000 it throws a long stack error mainly with that message:

z2cw6v06.4ja(43,10): error CS0518: Predefined type 'System.Object' is not defined or imported
z2cw6v06.4ja(43,50): error CS0012: The type 'Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
z2cw6v06.4ja(43,10): error CS0518: Predefined type 'System.Void' is not defined or imported
z2cw6v06.4ja(45,10): error CS0012: The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
z2cw6v06.4ja(45,10): error CS0518: Predefined type 'System.Object' is not defined or imported
z2cw6v06.4ja(45,50): error CS0012: The type 'Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
z2cw6v06.4ja(45,10): error CS0518: Predefined type 'System.Void' is not defined or imported
z2cw6v06.4ja(47,10): error CS0012: The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
z2cw6v06.4ja(47,10): error CS0518: Predefined type 'System.Object' is not defined or imported
z2cw6v06.4ja(47,50): error CS0012: The type 'Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

Can someone help me to solve that problem?

Obs.: It works on windows.

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  • Try dotnet run --framework net451 Commented Jun 7, 2016 at 1:32
  • Still doesn't work, but I believe I found a workaround to temporally fix it. I will update this after I have it tested. Commented Jun 8, 2016 at 17:31

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If you look closely, the error seems to be that MVC is failing to compile the view:

Microsoft.AspNetCore.Mvc.Razor.Compilation.CompilationFailedException: One or more compilation failures occurred:
pufduf6v.a1v(17,88): error CS1980: Cannot define a class or member that utilizes 'dynamic' because the compiler required type 'System.Runtime.CompilerServices.DynamicAttribute' cannot be found. Are you missing a reference?
pufduf6v.a1v(17,88): error CS0518: Predefined type 'System.Boolean' is not defined or imported
pufduf6v.a1v(17,47): error CS0012: The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
…

But running dotnet publish and then executing the result directly using mono works for me, e.g. (on Ubuntu):

mono bin/Debug/net451/ubuntu.14.04-x64/publish/WebApplicationBasic.exe

As was already explained to you on Github, this seems to be a known issue.

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I have already understood that it's a known issue, but I am seeking a way to make it work anyway. I am testing a possible solution posted there, when I have it done I will update if it has fully solved my problem.

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