Can C# generics have a specific base type?

Question

Is it possible for a generic interface's type to be based on a specific parent class?

For example:

public interface IGenericFace<T : BaseClass> { } 

Obviously the above code doesn't work but if it did, what I'm trying to tell the compiler is that T must be a sub-class of BaseClass. Can that be done, are there plans for it, etc.?

I think it would be useful in terms of a specific project, making sure a generic interface/class isn't used with unintended type(s) at compile time. Or also to sort of self-document: show what kind of type is intended.

Answer 1

public interface IGenericFace<T> where T : SomeBaseClass