private void OnAddLabelOperationCompleted(object arg) {
if ((this.AddLabelCompleted != null)) {
System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
this.AddLabelCompleted(this, new AddLabelCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
}
}