ASP.Net WebForm: rewrite rule is not working in my web.confi

Question

i am using webform and my .net framework version is 4.5. i need to inject country code in url. i could inject it from global.asax file.

 

here is the code

protected void Application_BeginRequest(Object sender, EventArgs e)
{
    string rawUrl = HttpContext.Current.Request.RawUrl;

    //check for 2 characters wrapped in forward slashes eg. /en/
    string countryCode = Utility.GetCountryCodeFromUrl(rawUrl);
    SiteCulture Culture = SiteGlobalization.DefaultCulture;


    if (string.IsNullOrEmpty(countryCode))
    {
        //check cookie
        if (!string.IsNullOrEmpty(Utility.GetCookieValue()))
        {
            string threeDigitIsoRegionCodeCookie = Utility.GetCookieValue();
            Culture = SiteGlobalization.BBACultures.Values.FirstOrDefault(x => x.ThreeDigitISORegionCode.Equals(threeDigitIsoRegionCodeCookie, StringComparison.InvariantCultureIgnoreCase));
            if (Culture != null && !string.IsNullOrEmpty(Culture.TwoDigitISORegionCode))
            {
                countryCode = Culture.TwoDigitISORegionCode;
            }
        }

        //check the referer.
        if (string.IsNullOrEmpty(countryCode) && HttpContext.Current.Request.UrlReferrer != null && !string.IsNullOrEmpty(HttpContext.Current.Request.UrlReferrer.AbsolutePath))
        {
            countryCode = Utility.GetCountryCodeFromUrl(HttpContext.Current.Request.UrlReferrer.AbsolutePath);
        }

        //finally browser
        countryCode = string.IsNullOrEmpty(countryCode) ? Utility.Get2DigitCountryCodeFromBrowser().ToLower() : countryCode;

        string redirectUrl = string.Format("/{0}{1}", countryCode, rawUrl);
        HttpContext.Current.Response.RedirectPermanent(redirectUrl.ToLower());
    }

    /* is the country code valid ? */
    Culture = SiteGlobalization.BBACultures.Values.FirstOrDefault(x => x.TwoDigitISORegionCode.Equals(countryCode, StringComparison.InvariantCultureIgnoreCase));

    if (Culture == null || string.IsNullOrEmpty(Culture.ThreeDigitISORegionCode))
    {
        HttpContext.Current.Response.RedirectPermanent(string.Format("/{0}/index.aspx", SiteGlobalization.DefaultCulture.TwoDigitISORegionCode.ToLower()));
    }

    if (HttpContext.Current.Request.FilePath.EndsWith("/" + countryCode))
    {
        HttpContext.Current.Response.RedirectPermanent(string.Format("/{0}/index.aspx", countryCode.ToLower()));
    }

    /* set the default cutlure */
    Utility.SetCountry(Culture);
}

the above code is working and injecting country code as per cookie value. so when i run my project from VS2013 IDE then url look like http://localhost:53741/gb/ or http://localhost:53741/gb/default

but getting error when browsing from IDE. because there is no folder called gb in my project.

so i add rewrite rule and that is as follows

<rewrite>
<rules>
<rule name="Rewrite language code">
<match url="^([a-z]+)/([0-9a-z]+).aspx" />
<action type="Rewrite" url="/{R:2}.aspx?lang={R:1}" />
</rule>
</rules>
</rewrite>

my full web.config code as follows with rewrite rule

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
    <pages>
      <namespaces>
        <add namespace="System.Web.Optimization" />
      </namespaces>
      <controls>
        <add assembly="Microsoft.AspNet.Web.Optimization.WebForms" namespace="Microsoft.AspNet.Web.Optimization.WebForms" tagPrefix="webopt" />
      </controls>
    </pages>
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" culture="neutral" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <system.webServer>
  <rewrite>
    <rules>
      <rule name="Rewrite language code">
        <match url="^([a-z]+)/([0-9a-z]+).aspx" />
        <action type="Rewrite" url="/{R:2}.aspx?lang={R:1}" />
      </rule>
    </rules>
  </rewrite>
  </system.webServer>
</configuration>

 probably something i have missed for my rewrite rule for which it is not working. so any one can tell me what is mistake in my code or in my rewrite rule ?

 

i am running site from VS2013 IDE and that is why i have not installed IIS rewrite module for IIS.