I was playing around with the new anonymous delegates feature of the Visual Studio 2005 (widbey), I wondered if i could use the this to write for age old data structures in different way, and here is the result!

class ADStack<T>
{
     delegate T popdelegate();
     private popdelegate popper=null;
     public T Pop()
     {
          return popper();
     }
     public void Push(T value)
     {
          popdelegate oldpopper = popper;
          popper = delegate{
                popper = oldpopper;
                return value;
          };
     }
}