// CS1503: Argument `#2' cannot convert `IContravariant' expression to type `ICovariant' // Line: 23 interface IContravariant { } interface ICovariant { } class C { public static void Test (ICovariant e1, ICovariant e2) { } public static void Main () { ICovariant a_2 = null; IContravariant b_2 = null; Test (a_2, b_2); } }