public List <Facturas> ListRepoOperacion()
 {
     try
     {
         List <Facturas>  _ListEstCartera = new List <Facturas>();
         PROC_CLEINTES_DB pros            = new PROC_CLEINTES_DB();
         DataTable        dt = new DataTable();
         dt = pros.REP_OPERACION();
         _ListEstCartera = (from DataRow dr in dt.Rows
                            select new Facturas()
         {
             VALOR = Int64.Parse(dr["VALOR"].ToString()),
             ABONOS = dr["ABONOS"].ToString(),
             SALD_ACTUAL = dr["SALDOACTUAL"].ToString(),
             CORRIENTE = dr["CORRIENTE"].ToString(),
             MES1 = dr["MES1"].ToString(),
             MES2 = dr["MES2"].ToString(),
             MES3 = dr["MES3"].ToString(),
             MES4 = dr["MES4"].ToString()
         }).ToList();
         return(_ListEstCartera);
     }
     catch (Exception Exc)
     {
         throw Exc;
     }
 }