protected virtual void OnCompleted(WorkItemCompletedEventArgs e)
{
//raise the Completed event ***on the form's synchronisation context***
EventHandler <WorkItemCompletedEventArgs> temp = this.Completed;
if (temp != null)
{
temp.Invoke(this, e);
}
}
//handler method to run when work has completed
private void item_Completed(object sender, WorkItemCompletedEventArgs e)
{
//GUI is free to update itself
this.Result = e.Result;
}