Generic conditional regions/methods

[Tyfyter]

It would be very helpful if certain members or certain parts of methods (but that's covered by discussion 6308) could be excluded based on generic constraints, for example:

public class Foo<T> {
	public void Bar(T value) where T : struct { … }
	public void Bar(T value) where T : class { … }
}

[huoyaoyuan]

This is overload by generic constraint, which is not supported in the CLR metadata system.