private void detach_Users(User entity)
		{
			this.SendPropertyChanging();
			entity.UserType = null;
		}
		private void attach_Users(User entity)
		{
			this.SendPropertyChanging();
			entity.UserType = this;
		}
 partial void UpdateUser(User instance);
 partial void DeleteUser(User instance);
 partial void InsertUser(User instance);