mcs/errors/cs8148.cs

   1 // CS8148: `B.Foo()': must not return by reference to match overridden member `A.Foo()'
   2 // Line: 11
   3
   4 public abstract class A
   5 {
   6         public abstract int Foo ();
   7 }
   8
   9 public class B : A
  10 {
  11         public override ref int Foo ()
  12         {
  13
  14         }
  15 }