partial void UpdateMessage(Message instance);
 partial void DeleteMessage(Message instance);
 partial void InsertMessage(Message instance);
		private void detach_Messages1(Message entity)
		{
			this.SendPropertyChanging();
			entity.User1 = null;
		}
		private void attach_Messages1(Message entity)
		{
			this.SendPropertyChanging();
			entity.User1 = this;
		}
		private void detach_Messages(Message entity)
		{
			this.SendPropertyChanging();
			entity.Group = null;
		}
		private void attach_Messages(Message entity)
		{
			this.SendPropertyChanging();
			entity.Group = this;
		}