errors/cs0738-2.cs

   1 // CS0738: `C' does not implement interface member `I2.Key.get' and the best implementing candidate `C.Key.get' return type `IB' does not match interface member return type `IA'
   2 // Line: 22
   3
   4 public interface I1
   5 {
   6         IB Key { get; }
   7 }
   8
   9 public interface I2
  10 {
  11         IA Key { get; }
  12 }
  13
  14 public interface IB : IA
  15 {
  16 }
  17
  18 public interface IA
  19 {
  20 }
  21
  22 public class C : I1, I2
  23 {
  24         public IB Key { get { return null; } }
  25 }