System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\NETStandard.Library.Ref@2.1.0\Microsoft.Win32.Primitives.dll' because it is being used by another process.

System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\NETStandard.Library.Ref@2.1.0\netstandard.dll' because it is being used by another process.

System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\NETStandard.Library.Ref@2.1.0\netstandard.dll' because it is being used by another process.

The code doesn't compile. Test0.cs(7,13): error CS0012: The type 'ValueType' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. Test0.cs(8,9): error CS0012: The type 'ValueType' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. using System.Linq; class Test { public Test() { var list = new int[5]; _ = list.Last(); list.First(x=> x == 0); } }