private void detach_Activity_Relay(Activity_Relay entity)
		{
			this.SendPropertyChanging();
			entity.Activity_Cycle = null;
		}
		private void detach_Activity_Relay(Activity_Relay entity)
		{
			this.SendPropertyChanging();
			entity.WeixinUser = null;
		}
 partial void UpdateActivity_Relay(Activity_Relay instance);
 partial void DeleteActivity_Relay(Activity_Relay instance);
 partial void InsertActivity_Relay(Activity_Relay instance);