-// CS0738: `C' does not implement interface member `I2.Key.get' and the best implementing candidate `C.Key' return type `IB' does not match interface member return type `IA'
+// 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'
// Line: 22
public interface I1