partial void DeletePart(Part instance);
 partial void UpdatePart(Part instance);
		private void detach_Part(Part entity)
		{
			this.SendPropertyChanging();
			entity.Project = null;
		}
 partial void InsertPart(Part instance);
		private void attach_Part(Part entity)
		{
			this.SendPropertyChanging();
			entity.Project = this;
		}