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 57:             else
Line 58:             {
Line 59:                 string strTitle = sub.Name.Trim();
Line 60:                 strTitle = strTitle.ToLower();
Line 61:                 strTitle = strTitle.Replace(" ", "-");

Source File: d:\AgriSite2016\ZU\agri_website\site_side.master.cs    Line: 59

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   site_side.Page_Load(Object sender, EventArgs e) in d:\AgriSite2016\ZU\agri_website\site_side.master.cs:59
   System.Web.UI.Control.OnLoad(EventArgs e) +107
   System.Web.UI.Control.LoadRecursive() +89
   System.Web.UI.Control.LoadRecursive() +184
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1606


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4075.0