VS 2017 RTM interferes with VS 2015 and .NET Core

[dcparsons]

This is similar to #454 Basically, I downloaded Visual Studio 2017 last week to evaluate it for use on our team, however the install of 2017 breaks Visual Studio 2015s ability to open/build a .NET Core application correctly. I uninstalled Visual Studio 2017, attempted to reinstall the .NET Core SDK, VS2015 Tooling, and so forth but nothing seemed to work. After installing / uninstalling 2017 I ran into 3 problems:

• On opening the project in 2015 I receive the message ... "No executable found matching command "dotnet-projectmodel-server""

• Trying to build results in the error: Microsoft.DotNet.props could not be found. I found this file in an MSBuild directory that was different than the one that was noted in VS. I copied the directory that contained the .DotNet.props file to the location Visual Studio was looking.

• MSB4184 - The expression "Registry:HKEY_LOCAL_MACHINE\Software\Microsoft\VisualStudio\14.0\Setup\EDev@StanDir" cannot be evaluated. [{{Path to xproj}}] {{Project Name}} C:\Program Files\dotnet\sdk\1.0.1\Microsoft\VisualStudio\v14.0\CodeAnalysis\Microsoft.CodeAnalysis.targets 25

I have read through a number of articles on SO as well as issues here on GitHub and everything that I have tried hasn't fixed the issue. Any thoughts?

[joeaudette]

Do you have a global.json file in the vs2015 solution to declare the sdk version? mine looks like this:

{
  "projects": [ "src", "test" ],
  "sdk": {
    "version": "1.0.0-preview2-1-003177"
  }
}

[dcparsons]

@joeaudette Thank you for that. No I did not. For anyone else that may stumble across this:

The versions of .NET Core on your windows system are in C:\Program Files\dotnet\sdk. In my case I have

• 1.0.0

• 1.0.0-preview2-003131

• 1.0.1

In my situation I needed to add the following to my global.json file

{
  "sdk": {
    "version": "1.0.0-preview2-003131"
  }
}

[Kritner]

I have a project structure similar to this:

trunk/someProj/...
trunk/solutions/someProj/someProj.sln

where should this global.json go? I have it under trunk/solutions/someProj/, but i'm still getting numerous errors:

Severity	Code	Description	Project	File	Line	Suppression State
Error	MSB4062	The "GetTransitiveNonDotNetProjectDependencies" task could not be loaded from the assembly C:\Program Files\dotnet\sdk\1.0.3\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Tasks.dll. Could not load file or assembly 'Microsoft.Build.Utilities.v4.0, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask. [Redact] C:\Program Files\dotnet\sdk\1.0.3\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Common.Targets	330	

[dcparsons]

My global.json file is in the root of my project folder.

[Kritner]

@dcparsons yeah, I eventually got it building in VS2015 again, but it seems like i had to put that global.json specifying the version to use, in every project folder. With a large code base like the one I'm working in that was a lot of folders. I guess there's no "inheriting" from a parent folder global.json in that regard? It did not seem to work for me anyway.