What does the keyword “where” in a class declaration do?

Question

I\'m looking at the source code for the MvcContrib Grid and see the class declared as:

public class Grid : IGrid where T : class
         


        

Answer 1

you can apply restrictions to the kinds of types that client code can use for type arguments when it instantiates your class are called as Constraints on Type Parameters

E.g : where T : class

Here where T is the Type , The type argument must be a reference type; this applies also to any class, interface, delegate, or array type.