protected IEnumerable GetPersonalsData()
        {
           // List personel;
            using (FirmaEntities firmactx = new FirmaEntities())
            {
                var personeldata = (from p in firmactx.Personals select new { p.ID, p.Name, p.SurName });
              return personeldata.AsEnumerable();
            }
        }

i wan to send GetPersonelData() into GridView DataSource. Like That:

 gwPersonel.DataSource = GetPersonelData(); 
                gwPersonel.DataBind();

it monitored to me on : gwPersonel.DataBind(); this error:

"The ObjectContext instance has been disposed and can no longer be used for operations that require a connection."