Why ref and out are not sufficient to disambiguate overloaded in C#?

Question

For example, why this method Max(ref int x, ref int y) is not considered overload of Max(int x, int y)? Why is the same with out?

Answer 1

ref and out are the same thing, symantically. The CLR does not differentiate between the two. The C# language is making the distinction. For the CLR, there is only ref.