Does .NET have a built-in EventArgs?

Question

I am getting ready to create a generic EventArgs class for event args that carry a single argument:

public class EventArg : EventArgs
{
    // Prope         


        

Answer 1

The problem with a generic type is that even if DerivedType inherits from BaseType, EventArgs(DerivedType) would not inherit from EventArgs(BaseType). Using EventArgs(BaseType) would thus prevent later using a derived version of the type.