mcs/tests/gtest-variance-2.cs

   1 interface IFoo<in T>
   2 {
   3         string Bar (T t);
   4 }
   5
   6 class Foo : IFoo<object>
   7 {
   8         public string Bar (object t)
   9         {
  10                 return t.GetType ().FullName;
  11         }
  12 }
  13
  14 public class Test
  15 {
  16         public static int Main ()
  17         {
  18                 IFoo<object> foo = new Foo ();
  19                 IFoo<string> foo2 = foo;
  20
  21                 if (foo2.Bar ("blah") != typeof (string).FullName)
  22                         return 1;
  23
  24                 foo2 = new Foo();
  25                 if (foo2.Bar ("blah") != typeof (string).FullName)
  26                         return 2;
  27
  28
  29                 return 0;
  30         }
  31 }