RetrieveFolderAndDescendantsCompletedEventHandler public sealed delegate RetrieveFolderAndDescendantsCompletedEventHandler : MulticastDelegate Documentation public RetrieveFolderAndDescendantsCompletedEventHandler(object TargetObject, IntPtr TargetMethod) public virtual IAsyncResult BeginInvoke(object sender, RetrieveFolderAndDescendantsCompletedEventArgs e, AsyncCallback DelegateCallback, object DelegateAsyncState) public virtual void EndInvoke(IAsyncResult DelegateAsyncResult) public virtual void Invoke(object sender, RetrieveFolderAndDescendantsCompletedEventArgs e)