i want to get a ip address of a system

public ActionResult Create()
       {
           //requesting ip IPAddress of machine
          string ipAddress = Request.ServerVariables["REMOTE_ADDR"];
          string ipAddress2 = Request.UserHostAddress;



           ViewBag.Org_id = new SelectList(db.Organizations, "ID", "Organization_name");
           ViewBag.Visitor_id = new SelectList(db.Visitors, "ID", "First_name");


           return View();
       }