private void detach_Person_Challenge(Person_Challenge entity)
		{
			this.SendPropertyChanging();
			entity.Challenge = null;
		}
 partial void DeletePerson_Challenge(Person_Challenge instance);
 partial void InsertPerson_Challenge(Person_Challenge instance);
 partial void UpdatePerson_Challenge(Person_Challenge instance);
		private void attach_Person_Challenge(Person_Challenge entity)
		{
			this.SendPropertyChanging();
			entity.Person = this;
		}