[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +13033687
System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +122
System.Int32.Parse(String s) +26
Technowow.project_single.Page_PreInit(Object sender, EventArgs e) in D:\project\project Technowow\The Kuwait Society For The Handicapped\new-update\Technowow\project_single.aspx.cs:34
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
System.Web.UI.Page.OnPreInit(EventArgs e) +9866326
System.Web.UI.Page.PerformPreInit() +38
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +302
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