partial void Deletesns_user(sns_user instance);
 partial void Updatesns_user(sns_user instance);
		private void detach_sns_users(sns_user entity)
		{
			this.SendPropertyChanging();
			entity.sns_type = null;
		}
 partial void Insertsns_user(sns_user instance);
		private void attach_sns_users(sns_user entity)
		{
			this.SendPropertyChanging();
			entity.sns_type = this;
		}