How to use async/await with a library that uses an event-based asynchronous pattern?

Question

I use a library that has an asynchronous method called DoWork(...) that will raise a WorkDone event when the operation completes.

I would like to write a method that

Answer 1

You can use TaskCompletionSource:

public async Task SomeMethod()
{
   var result = new TaskCompletionSource();

   library.WorkDone += (data) =>
                                {
                                    result.SetResult(data);
                                };
   library.DoWork();

   return await result.Task;
}