Why aren't type constraints part of the method signature?

Question

UPDATE: As of C# 7.3, this should no longer be an issue. From the release notes:

When a method group contains some generic methods w

Answer 1

The C# compiler has to not consider type constraints as part as the method signature because they are not part of the method signature for the CLR. It would be disastrous if the overload resolution worked differently for different languages (mainly due to the dynamic binding that may happen at runtime and should not be different from one language to another, or else all hells would break loose).

Why was it decided that these constraints would not be part of the method signature for the CLR is another question alltogether, and I could only make ill informed suppositions about that. I'll let the people in the know answer that.