Geoprocessing tasks report success, but do not complete (C#)

Question

I have been trying some simple geoprocessing tasks in a Silverlight application. 
The tasks do not need any parameters.  I code the task thus

Wait.Visibility = Visibility.Visible;
           
  MyMap.Cursor = System.Windows.Input.Cursors.Wait;
           
 _geoprocessorTask.OutputSpatialReference = new SpatialReference(2256);
           
 _geoprocessorTask.SubmitJobAsync(null);

This works fine in the application for copying a folder or frenaming folders and files.
Other tools though report success but do not actually do the task. Copying a file does not work
for example.

if (string.Equals(e.JobInfo.JobStatus.ToString(), "esriJobSucceeded"))
          
       {
           Wait.Visibility = Visibility.Collapsed;      
        }

Ideas?

JudyTroutwine · Accepted Answer

The answer turned out to be simply that asynchronous tasks copy results to the arcgisjobs folder.