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 47:         int Id = Convert.ToInt32(id);
Line 48:         var news = db.News.Where(p => p.Id == Id).Select(t=>t.NewsGroup);
Line 49:         string newsGroupTitle = news.Select(p => p.Title).First();
Line 50:         string pId=news.Select(t => t.ParentId).First().ToString();
Line 51:         string NewsTitle = db.News.Where(p => p.Id == Id).Select(t => t.Title).First();

Source File: c:\inetpub\vhosts\naghashbashi.com\httpdocs\news\detail\Default.aspx.cs    Line: 49

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.First(IEnumerable`1 source) +405
   news_detail_Default.checkTitle(Object id, Object Title) in c:\inetpub\vhosts\naghashbashi.com\httpdocs\news\detail\Default.aspx.cs:49
   ASP.news_detail_default_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in c:\inetpub\vhosts\naghashbashi.com\httpdocs\news\detail\Default.aspx:12
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   ASP.main_master.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in c:\inetpub\vhosts\naghashbashi.com\httpdocs\main.master:111
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +11832233
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +47
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +50
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250
   System.Web.UI.Page.Render(HtmlTextWriter writer) +39
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8753


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3650.0