Server Error in '/' Application.

Sequence contains no elements

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Sequence contains no elements

Source Error:


Line 158:    public static string secondHandLink()
Line 159:    {
Line 160:        category catSecond = db.categories.Single(p => p.categoryID == 40);
Line 161:        return urlFriendly(catSecond.hebrew_name);
Line 162:    }

Source File: c:\HostingSpaces\aviyaffe\aviyaffe.com\wwwroot\App_Code\helpers.cs    Line: 160

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) +847
   System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) +113
   System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +344
   System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute(Expression expression) +49
   System.Linq.Queryable.Single(IQueryable`1 source, Expression`1 predicate) +301
   helpers.secondHandLink() in c:\HostingSpaces\aviyaffe\aviyaffe.com\wwwroot\App_Code\helpers.cs:160
   site.Page_Load(Object sender, EventArgs e) in c:\HostingSpaces\aviyaffe\aviyaffe.com\wwwroot\site.master.cs:15
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627


Version Information: Microsoft .NET Framework Version:2.0.50727.8806; ASP.NET Version:2.0.50727.8762