// CS0425: The constraints for type parameter `V' of method `Foo<T,X>.Test<V>()' must match the constraints for type parameter `U' of interface method `IFoo<T>.Test<U>()'. Consider using an explicit interface implementation instead // Line: 11 interface IFoo<T> { void Test<U> () where U : T; } class Foo<T, X> : IFoo<T> { public void Test<V> () where V : X { } }