vscode-csharp: XUnit projects cannot be launched under the debugger

The symptoms are related to those described in #1253, but wasn’t solved with the thing the closed that one. Environment info is the same.

λ dotnet --info
.NET Command Line Tools (1.0.0-rc4-004771)

Product Information:
 Version:            1.0.0-rc4-004771
 Commit SHA-1 hash:  d881d45b75

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.0-rc4-004771

@gregg-miskelly:

Do you always see the program has exited with code 0 or is it intermittent? If you always get it –

• What is program set to in launch.json?
• Can you send me the output you get in your console window?

Yes, the issue is 100% repeatable. In this case, the problem is with an Xunit project, called Saddleback.AspNetCore.Features.Test. The project file as as follows:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFrameworks>netcoreapp1.0;netcoreapp1.1</TargetFrameworks>
    <NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
    <PackageReference Include="xunit" Version="2.2.0" />
    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" />
    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="1.1.0"/>
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="../../src/Saddleback.AspNetCore.Features/Saddleback.AspNetCore.Features.csproj"/>
    <ProjectReference Include="../Saddleback.Logging.Xunit/Saddleback.Logging.Xunit.csproj"/>
  </ItemGroup>

</Project>

The launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": ".NET Core Launch (console)",
            "type": "coreclr",
            "request": "launch",
            "preLaunchTask": "build",
            "program": "${workspaceRoot}\\test\\Saddleback.AspNetCore.Features.Test\\bin\\Debug\\netcoreapp1.0\\Saddleback.AspNetCore.Features.Test.dll",
            "args": [],
            "cwd": "${workspaceRoot}",
            "externalConsole": false,
            "stopAtEntry": false,
            "internalConsoleOptions": "openOnSessionStart"
        },
        {
            "name": ".NET Core Attach",
            "type": "coreclr",
            "request": "attach",
            "processId": "${command:pickProcess}"
        }
    ]
}

the console output:

Microsoft (R) Build Engine version 15.1.545.13942
Copyright (C) Microsoft Corporation. All rights reserved.
  Saddleback.AspNetCore.Features -> d:\Users\ben\proj\sb\SaddlebackFeatures\src\Saddleback.AspNetCore.Features\bin\Debug\netstandard1.4\Saddleback.AspNetCore.Features.dll
  Saddleback.Logging.Xunit -> d:\Users\ben\proj\sb\SaddlebackFeatures\test\Saddleback.Logging.Xunit\bin\Debug\netstandard1.4\Saddleback.Logging.Xunit.dll
  Saddleback.AspNetCore.Features.Test -> d:\Users\ben\proj\sb\SaddlebackFeatures\test\Saddleback.AspNetCore.Features.Test\bin\Debug\netcoreapp1.0\Saddleback.AspNetCore.Features.Test.dll
  Saddleback.AspNetCore.Features.Test -> d:\Users\ben\proj\sb\SaddlebackFeatures\test\Saddleback.AspNetCore.Features.Test\bin\Debug\netcoreapp1.1\Saddleback.AspNetCore.Features.Test.dll
Build succeeded.
    0 Warning(s)
    0 Error(s)
Time Elapsed 00:00:07.60

and the debug console output:

--------------------------------------------------------------------------------
You may only use the Microsoft .NET Core Debugger (clrdbg) with Visual Studio
Code, Visual Studio or Visual Studio for Mac software to help you develop and
test your applications.
--------------------------------------------------------------------------------
Loaded 'C:\Program Files\dotnet\shared\Microsoft.NETCore.App\1.0.3\System.Private.CoreLib.ni.dll'. Cannot find or open the symbol file.
Loaded 'd:\Users\ben\proj\sb\SaddlebackFeatures\test\Saddleback.AspNetCore.Features.Test\bin\Debug\netcoreapp1.0\Saddleback.AspNetCore.Features.Test.dll'. Symbols loaded.
Loaded 'C:\Program Files\dotnet\shared\Microsoft.NETCore.App\1.0.3\System.Runtime.dll'. Cannot find or open the symbol file.
Loaded 'C:\Program Files\dotnet\shared\Microsoft.NETCore.App\1.0.3\mscorlib.dll'. Cannot find or open the symbol file.
The program 'd:\Users\ben\proj\sb\SaddlebackFeatures\test\Saddleback.AspNetCore.Features.Test\bin\Debug\netcoreapp1.0\Saddleback.AspNetCore.Features.Test.dll' has exited with code 0 (0x00000000).