Delegates in .NET are a very handy addition to the language. With the introduction of LINQ they did become mainstream and everyone is using them or is at least finding them cool. But what the CLR is really doing to them under the covers remains largely unexplored. This is ok as long as you never get any memory dumps from the field with angry customers waiting for a solution. Delegates are heavily used to e.g. send window messages from an arbitrary thread to the main UI thread. Or you have an thread ......