Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 79:                                 group p by p.product_name into g
Line 80:                                 select new { g };
Line 81:             TitleString = "Sell my" + ProductsBrand.FirstOrDefault().g.FirstOrDefault().brand + " " + (Request.QueryString["brand"]=="Apple" ? "iPhone" : "mobile phone" ) + " | Mobile Phone Recycling Comparison: Sell My Old Mobile Phone.";
Line 82: 
Line 83:             canonical = "http://www.sellmyoldmobilephone.co.uk/brand/" + ProductsBrand.FirstOrDefault().g.FirstOrDefault().brand.Replace(" ", "_") + "/";  

Source File: e:\webroot\sellingmymobilephone\web\_Page.master.cs    Line: 81

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   _Page.Page_Load(Object sender, EventArgs e) in e:\webroot\sellingmymobilephone\web\_Page.master.cs:81
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +95
   System.Web.UI.Control.LoadRecursive() +59
   System.Web.UI.Control.LoadRecursive() +131
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4087.0