Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 public PKCategoryDecorator(PKCategory pkCategory)
 {
     this.pkCategory = pkCategory;
 }
 partial void DeletePKCategory(PKCategory instance);
 partial void InsertPKCategory(PKCategory instance);
 partial void UpdatePKCategory(PKCategory instance);
		private void detach_PKCategories(PKCategory entity)
		{
			this.SendPropertyChanging();
			entity.PKGroup = null;
		}