using System;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.UI;

protected override void Render(HtmlTextWriter writer)
{
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
HtmlTextWriter hWriter = new HtmlTextWriter(sw);
base.Render(hWriter);
string html = sb.ToString();
html = Regex.Replace(html, "<input[^>]*id=/"(__VIEWSTATE)/"[^>]*>", string.Empty, RegexOptions.IgnoreCase);
writer.Write(html);
}