public void SirketGoster(int Id, int parentId)
{
List<SelectListItem> list = new SelectList(db.dt_company.ToList().Where(a => a.active == 1 && a.ID != Id && a.parentID != Id), "ID", "companyname", parentId).ToList<SelectListItem>();
SelectListItem it = new SelectListItem();
it.Text = "Merkezi Şirket";
it.Value = "0";
list.Add(it);
if (parentId == 0)
list.Reverse();
ViewBag.companyId = list.ToList();
}