System.IndexOutOfRangeException: There is no row at position 0. at System.Data.RBTree`1.GetNodeByIndex(Int32 userIndex) at tesseramentoSAT.DownloadTariffarioRifugio.ProcessRequest(HttpContext context) in D:\progetti\E\SAT\Tesseramento\code\www\ws\website\DownloadTariffarioRifugio.ashx.vb:line 13