Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteAttachment(Attachment instance);
 partial void UpdateAttachment(Attachment instance);
		private void detach_Attachments(Attachment entity)
		{
			this.SendPropertyChanging();
			entity.General = null;
		}
 partial void InsertAttachment(Attachment instance);
		private void attach_Attachments(Attachment entity)
		{
			this.SendPropertyChanging();
			entity.TpUser = this;
		}