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You exactly need these versions to run xproj based .NET project with VS 2015, and run unit tests with Resharper:

• .NET Core SDK: 1.0.0-preview2-003121 link
• VS 2015 with Update 3 link
• DotNetCore.1.0.1-VS2015Tools.Preview2.0.3.exe link
• Resharper 2016.3.2

And may be you need global.json

{
  "projects": [
    "src"
  ],
  "sdk": { "version": "1.0.0-preview2-003121" }
}