partial void InsertGroupMessage_Alias(GroupMessage_Alias instance);
		private void detach_GroupMessage_Alias(GroupMessage_Alias entity)
		{
			this.SendPropertyChanging();
			entity.Alias = null;
		}
 partial void DeleteGroupMessage_Alias(GroupMessage_Alias instance);
		private void attach_GroupMessage_Alias(GroupMessage_Alias entity)
		{
			this.SendPropertyChanging();
			entity.GroupMessage = this;
		}
 partial void UpdateGroupMessage_Alias(GroupMessage_Alias instance);