判断IP地址验证

       //判断IP地址
        string address = Request.UserHostAddress;//获取远程客户端的IP地址
        TextBox1.Text = address;
        if (!address.Contains("192.0.23.") && !address.Contains("111.2.27.") && !address.Contains("188.3.11."))
        {
            HttpContext.Current.Response.Write("判断IP地址验证失败!");
            return;
        }