Specify a C# Generic Constraint to be of ClassA OR ClassB?

Question

Is there a way to specify that a generic type be of one type or another type?

public class SoftDrink<T>
    where T : TypeOne or TypeTwo
{ }

Answer 1

Nope because that wouldn't make any sense. If you try to access a member function of "T", how can the compiler tell which base class to try and resolve members of?

You could try creating a common interface for TypeOne and TypeTwo and having the constraint specify that interface? What are you trying to accomplish, exactly?