'name' in explicit interface declaration is not an interface
An attempt was made to explicitly declare an interface, but an interface was not specified.
The following sample generates CS0538:
namespace x { interface IMyFace { void F(); } public class CMyClass { public void G(); } class C: IMyFace { void IMyFace.F() { } void CMyClass.G() { // CS0538, CMyClass not an interface } } }