title: The SDK 'Microsoft.NET.Sdk' specified could not be found error in Jekin build
body: <p>I am very new to CI/CD. I'm now trying to integrate Jekins, xunit test, asp.net core and gitlab. </p>
  
  <p>I created a new freestyle project and linked to my gitlab. after that, I configured the MSBuild from global tool configuration. after that, I configured the Build session like that <a href="https://i.stack.imgur.com/pAkyk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pAkyk.png" alt="that "></a>. When I start building, I got this <a href="https://i.stack.imgur.com/gUmGp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gUmGp.png" alt="error"></a>. I have already tried to add path variable MSBuildSDKsPath to C:\Program Files\dotnet\sdk\2.1.500\Sdks but it doesn't work. pls help me, Thanks</p>