title: how to solve Object reference not set to an instance of an object in asp.net
body: <pre><code> protected void Page_Load(object sender, EventArgs e)
          {
  
  
           num = Convert.ToInt32(Request.QueryString["RegNo"].ToString());
              if (!IsPostBack)
              {
                  BindTextBoxvalues();
              }    
          }
  </code></pre>
  
  <p>here it will display an error :
  Object reference not set to an instance of an object </p>