[Forums] Asynchronous programming in .net Extensions

Timothy , i just made it! You have to use .ConfigureAwait(false);
"Await resumes execution in the Synchronization context (essentially the thread) that started awaiting. If that thread is already blocked, eg. by awaiting itself on something else, the code deadlocks.": https://stackoverflow.com/questions/17202709/iis-failing-when-await-task-used