Examples of invariance in c#

  class Test <T>

    {

        public T  y { get; set; }

    }

         

  Test<string> r = new Test<string>();

  Test<object> r2 = r;

this fails

likewise

  public void consumeList(List<object> l)

        {

        }

consumeList(new List<object>(){"fgdg","ghffh"}); 

is OK  while

t.consumeList(new List<string>(){"fgdg","ghffh"});  

fails