Type or namespace name ‘VisualStudio’ does not exist in the namespace ‘Microsoft’

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I got this error when trying to build a project in TFS. These steps fixed it:

  • remove reference to Microsoft.VisualStudio.QualityTools.UnitTestFramework
  • add nuget MSTest.TestFramework
  • add nuget MSTest.TestAdapter (optional but needed to run tests inside Visual Studio)

The above steps caused this element to be removed from my .csproj file:

<Reference Include="Microsoft.VisualStudio.QualityTools.UnitTestFramework" />

And these two were added instead:

    <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <HintPath>..\packages\MSTest.TestFramework.2.1.1\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.dll</HintPath>
    </Reference>
    <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <HintPath>..\packages\MSTest.TestFramework.2.1.1\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions.dll</HintPath>
    </Reference>

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