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 16:         if (RouteData.Values["NewsName"] != null)
Line 17:         {
Line 18:             var ContentQuery = (from x in cds.news_s where x.id == Convert.ToInt32(RouteData.Values["Id"]) select x).Single();
Line 19:             contentLt.Text = "<h1>" + ContentQuery.n_header + "</h1><p>" + ContentQuery.n_content + "</p>";
Line 20: 

Source File: c:\inetpub\vhosts\turkuazvadisi.com.tr\httpdocs\Page.aspx.cs    Line: 18

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) +1217
   System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) +120
   System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +360
   System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +58
   System.Linq.Queryable.Single(IQueryable`1 source) +220
   Page.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\turkuazvadisi.com.tr\httpdocs\Page.aspx.cs:18
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0