Application hangs on wait async method [duplicate]

Answer 1

You will almost never want to call wait when you have async methods.

Here is an example how deadlock can happen

1. async method called
2. async method enters wait and main thread runs something else
3. main thread executes a method calling wait()
4. wait is waiting for async to finish
5. async is waiting for main thread to become free
6. DEAD LOCK

so if it is possible, change the method where you are calling .wait() on to be async and call await on it

Answer 2

You're experiencing a deadlock.

Why do you use .Wait() on that method call ?

You should make your calling method async and await the Task.

    private async void OnVendorPropertyChanged(PropertyChangedMessage<Vendor> vendor)
    {
         Debug.WriteLine("Enter OnVendorPropertyChanged");

         //application hangs when vendor is changed
         await LoadDriversAsync(Vendor.DCP);
         Debug.WriteLine("Leave OnVendorPropertyChanged");
    }