I\'m getting this error when opening .NET Core projetcs in VS 2015 Community:
The following error ocurred attempting to run the project model server
Another option to fix this is to add a Solution folder called "Solution Items" and add a global.json file in it with an "sdk" element specifying the correct SDK version if you have multiple installed side-by-side. I installed 2017 RC and I started getting this error because it installs Preview 4. I don't want to uninstall Preview 4 or 2017 will stop working. Adding the global.json file with the following text fixed it for me. (check your %PROGRAMFILES%\dotnet\sdk folder for installed SDK versions.)
{ "sdk" : { "version" : "1.0.0-preview2-1-003177" } }