This class is a placeholder for use with generics. It helps you test generic types by letting you pass non-specific type arguments.
Assembly: Microsoft.VisualStudio.QualityTools.UnitTestFramework (in Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll)
A unit test might not be able to pass a real type to a generic method that it is testing. That code can instead pass this generic placeholder.
When the Team System testing tools generates a unit test for testing a generic type, the calls that test that generic type use placeholder generic type arguments.