private void detach_Buildings(Building entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
		private void attach_Buildings(Building entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}
 partial void UpdateBuilding(Building instance);
 partial void DeleteBuilding(Building instance);
 partial void InsertBuilding(Building instance);