partial void DeleteBorough(Borough instance);
 partial void UpdateBorough(Borough instance);
		private void detach_Boroughs(Borough entity)
		{
			this.SendPropertyChanging();
			entity.City = null;
		}
 partial void InsertBorough(Borough instance);
		private void attach_Boroughs(Borough entity)
		{
			this.SendPropertyChanging();
			entity.City = this;
		}