Question

I have a sample WinForms app with a WCF proxy. I am using the FromAsync to return a Task and waiting on the task to complete before i return the result:

private bool Foo() {   
  var proxy = new MyProxy();   
  var request = new ProxyRequest();

  var task = Task<ReturnType>.Factory.FromAsync<ProxyRequest>(client.BeginCall, client.EndCall, request, null);   
  task.Wait();   
  return true; 
}

When calling this method from a button click on the form the UI thread is blocked. Why?

Answer 1

Because you are explicitly waiting for the task to finish before continuing when calling task.Wait().