// CS0121: The call is ambiguous between the following methods or properties: `C.Foo(int, params string[])' and `C.Foo(string[], int)' // Line: 9 class C { public static void Main () { var d = new C (); d.Foo (x: 1, y: new [] { "" }); } public void Foo (int x, params string[] y) { } public void Foo (string[] y, int x) { } }