I have problem in Rewrite url

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ASP.NET

C#3.5

I have dynamic menu, dynamic meta title,meta descritption. I am binding all the data dynamically through stringbuilder and their format is default.aspx?ID=1.here I need querystring because each page will be bind dynamically.Now, i have problem in Rewrite url.i wrote all these code below.

Note:for menu bind i have user control and for meta title and desciption i have masterpage.
i changes web config for required changes.

*****problem is where to bind below code for proper change in url.******

public static string GenerateURL(object Title)
        {
            string strTitle = Title.ToString();

            strTitle = strTitle.Trim();
            strTitle = strTitle.Trim('-');

            strTitle = strTitle.ToLower();
            char[] chars = @"$%#@!*?;:~`+=()[]{}|\'<>,/^&"".".ToCharArray();
            strTitle = strTitle.Replace("c#", "C-Sharp");
            strTitle = strTitle.Replace("vb.net", "VB-Net");
            strTitle = strTitle.Replace("asp.net", "Asp-Net");
            strTitle = strTitle.Replace(".", "-");
            for (int i = 0; i < chars.Length; i++)
            {
                string strChar = chars.GetValue(i).ToString();
                if (strTitle.Contains(strChar))
                {
                    strTitle = strTitle.Replace(strChar, string.Empty);
                }
            }
            strTitle = strTitle.Replace(" ", "-");

            strTitle = strTitle.Replace("--", "-");
            strTitle = strTitle.Replace("---", "-");
            strTitle = strTitle.Replace("----", "-");
            strTitle = strTitle.Replace("-----", "-");
            strTitle = strTitle.Replace("----", "-");
            strTitle = strTitle.Replace("---", "-");
            strTitle = strTitle.Replace("--", "-");
            strTitle = strTitle.Trim();
            strTitle = strTitle.Trim('-');
            strTitle = "~" + strTitle;

            return strTitle;
        }