Let's say I have code that uses the Asynchronous Programming Model, i.e. it provides the following methods as a group which can be used synchronously or asynchronously:

public MethodResult Operation(<method params>);

public IAsyncResult BeginOperation(<method params>, AsyncCallback callback, object state);
public MethodResult EndOperation(IAsyncResult ar);

What I want to do is wrap this code with an additional layer that will transform it into the event-driven asynchronous model, like so:

public void OperationAsync(<method params>);
public event OperationCompletedEventHandler OperationCompleted;
public delegate void OperationCompletedEventHandler(object sender, OperationCompletedEventArgs e);

Does anyone have any guidance (or links to such guidance) on how to accomplish this?