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;
}