Writing the simplest code (Part2)

Turns out there was an even simpler way to write a concrete implementation of ICollection:

namespace Testing.Collections

{

    public class EmptyCollection<A> : ICollection<A>

    {

        public EmptyCollection() {

        }

        #region ICollection<A> Members

        public bool Add(A element) {

            return false;

        }

        public bool Empty {

            get {

                return true;

            }

        }

        #endregion

    }

}

I thought of this implementation after the conversation I had with Julien Covreur (concerning Weak/StrongReferences) regarding the Replace Type Code with Subclasses refactoring.  I'm not a big fan of either state or mutability of objects and i prefer to have both fall out of the system naturally through the use of inheritance.

Note: because there is no state and no mutability, this object is a prime candidate for the singleton pattern.  That, of course, can come at a later time.

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