private void OnUpdatePropertyGroupsOperationCompleted(object arg) {
if ((this.UpdatePropertyGroupsCompleted != null)) {
System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
this.UpdatePropertyGroupsCompleted(this, new System.ComponentModel.AsyncCompletedEventArgs(invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
}
}