Using ParseQueryString to get querystring values

Its been long I haven’t posted anything technical so just thought of sharing this with you guys,

Following is the sample code you can use to parse your querystring and return NameCollectionValue

protected void Page_Load(object sender, EventArgs e)
  {
    String currurl = HttpContext.Current.Request.RawUrl;
    String querystring = null ;

    // Check to make sure some query string variables
    // exist and if not add some and redirect.
    int iqs = currurl.IndexOf('?');
    if (iqs == -1)
    {
      String redirecturl = currurl + "?var1=1&var2=2+2%2f3&var1=3";
      Response.Redirect(redirecturl, true); 
    }
    // If query string variables exist, put them in
    // a string.
    else if (iqs >= 0)
    {
      querystring = (iqs < currurl.Length - 1) ? currurl.Substring(iqs + 1) : String.Empty;
    }

    // Parse the query string variables into a NameValueCollection.
    NameValueCollection qscoll = HttpUtility.ParseQueryString(querystring);

    // Iterate through the collection.
    StringBuilder sb = new StringBuilder("
");
    foreach (String s in qscoll.AllKeys)
    {
      sb.Append(s + " - " + qscoll[s] + "
");
    }

    // Write the result to a label.
    ParseOutput.Text = sb.ToString();

  }

This is the front end code ,

Hope this helps