file attachment form c#

I'm creating a web form that requires an user to upload a file in doc, docx or pdf format. On submit, the form gets posted to an email address along with the attached file. I have successfully implemented the posting of the form to the email address but don't know how to attach the file with it. Please help.

public void ProcessRequest(HttpContext context)
{
    string template = context.Request["template"];

    string responseHtml = BuiltTemplateHtml(context.Request, template, "response", false);
    string reuestEmailHtml = BuiltTemplateHtml(context.Request, template, "request_email", false);
    string contactEmail = GetTagsInnerText(reuestEmailHtml, "to", 0);
    string contactName = GetTagsInnerText(reuestEmailHtml, "toname", 0);

    string responEmailHtml = BuiltTemplateHtml(context.Request, template, "response_email", true, "contactName", contactName, "contactEmail", contactEmail);

    sendEmail(reuestEmailHtml);
    sendEmail(responEmailHtml);
    context.Response.ContentType = "text/html";
    context.Response.Write(responseHtml);

    SaveAttachments(context, reuestEmailHtml);

}

private void SaveAttachments(HttpContext context, string settingFile)
{
    if (context.Request.Files.Count > 0)
    {
        string fileNameformat = GetTagsInnerText(settingFile, "fileNameformat", 0);
        string[] savefiles = GetTagsInnerText(settingFile, "savefiles", 0).Split('|', ',');
        string[] allowextensions = GetTagsInnerText(settingFile, "allowextensions", 0).Split('|', ',');                
        string path = cleanPath(fileNameformat);

        MailMessage mail = new MailMessage();

        // attachment code here        
    }
}