Catching 404 Error in WebApplication

The code snippet explaind how to handle the 404 (FileNotFoundException) in webApplication and to provide useful information.

In the global.asax Application_error Event write the following


C#.NET code :

  void Application_Error(object sender, EventArgs e)
    {
            Exception e1 = Server.GetLastError().GetBaseException();
            if (e1.GetType() == typeof(System.IO.FileNotFoundException))
            {
                Response.Redirect("ex.html");
            
        }
    }

  void Application_Error(object sender, EventArgs e)
    {

        Dim ex As Exception=Server.GetLastError().GetBaseException();
                  
        If TypeOf ex Is System.IO.FileNotFoundException Then

                Response.Redirect("ex.html");
  
       else

         //Code

       End If
}