Implementing IDisposable
Classes that need explicit destruction semantics or wrap managed resource usually implement IDisposable to allow for predictable destruction outside of garbage collection. As I was just reminded by a defect in my code, all classes that implement IDisposable must provide a finalizer (C# uses destructor syntax: ~MyClass) to handle freeing resources when Dispose is not called. Additionally, the Dispose method should call should call the GC.SuppressFinalize method for the object it is disposing. From MSDN, "If the object is currently on the finalization queue, GC.SuppressFinalize prevents its Finalize method from being called."
For more information, please see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemIDisposableClassDisposeTopic.asp