ASP.NET [C#] Redirect with post data

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Collections.Specialized;
using System.Text;

// ASP.NET [C#] REDIRECT WITH POST DATA
public static class WebExtensions
{
        public static void RedirectWithData(NameValueCollection data, string url)
        {
            HttpResponse response = HttpContext.Current.Response;
            response.Clear();

            StringBuilder s = new StringBuilder();
            s.Append("<html>");
            s.AppendFormat("<body onload='document.forms[\"form\"].submit()'>");
            s.AppendFormat("<form name='form' action='{0}' method='post'>", url);
            foreach (string key in data)
            {
                s.AppendFormat("<input type='hidden' name='{0}' value='{1}' />", key, data[key]);
            }
            s.Append("</form></body></html>");
            response.Write(s.ToString());
            response.End();
        }
}