[DataContract]
      public  class ItogAndAbon
     {
        public System.Int32 ItogID
        { get; set; }
        public System.String AbonName
        { get; set; }        
      }

public List<ItogAndAbon> GetItog()
           {
          
               BuhDataDataContext db = new BuhDataDataContext(ConfigurationManager.ConnectionStrings["buhConnectionString"].ConnectionString);
     
               var q = (from itogs in db.GetTable<itog>()
                        from abon in db.GetTable<abonen>()
                        where (
                             (abon.id == itogs.id_ab))
                             orderby abon.id
                        select new ItogAndAbon
                        {
                           ItogID = itogs.id,
                           AbonName=abon.name
                        }).ToList<ItogAndAbon>();
               return q.ToList();
           }