private void Page_Load(object sender, System.EventArgs e)

  private void Page_Load(object sender, System.EventArgs e)
  {
   Response.Expires=-1;
   if(!IsPostBack)
   {
    
    CodeHighlighterConfiguration codeConfig=(CodeHighlighterConfiguration)System.Configuration.ConfigurationSettings.GetConfig("codeHighlighter");
    foreach(string key in codeConfig.LanguageConfigs.Keys)
    {
     LanguageDropDownList.Items.Add(key);
     if(key=="C#")
     {
      LanguageDropDownList.SelectedIndex=LanguageDropDownList.Items.Count-1;
     }
    }

   }

  }