partial void Deleteuser_relation(user_relation instance);
partial void Updateuser_relation(user_relation instance);
private void detach_user_relations1(user_relation entity)
{
this.SendPropertyChanging();
entity.sns_user1 = null;
}
partial void Insertuser_relation(user_relation instance);
private void attach_user_relations(user_relation entity)
{
this.SendPropertyChanging();
entity.sns_user = this;
}