پیغام خطا

System.IndexOutOfRangeException: Index was outside the bounds of the array. at BaliniamaniWebsite.fa.DownloadFile.Page_Load(Object sender, EventArgs e) in E:\baliniamani.com\Projects\AndroidApplication\WebService\DesignedCode\Baliniamani_AndroidPanel\BaliniamaniWebsite\fa\DownloadFile.aspx.cs:line 133