// CS0121: The call is ambiguous between the following methods or properties: `C.M(System.Func<byte,int>)' and `C.M(System.Action<int>)' // Line: 18 using System; class C { static void M (Func<byte,int> arg) { } static void M (Action<int> arg) { } static void Main() { M(l => l.GetHashCode()); } }