//Pass the Values from the Textbox to this function
  public static string  SaveCredentials(string userName, string passWord, string passwordConfirm, bool updatePassword)
    {
        string statusMessage="";
        if (! System.IO.File.Exists(HttpContext.Current.Server.MapPath("Users.xml")))
            System.IO.File.Create(HttpContext.Current.Server.MapPath("Users.xml"));
        DataSet loginDS = new DataSet();
        //Read the Xml File
        loginDS.ReadXml(HttpContext.Current.Server.MapPath("Users.xml"));

        loginDS.Tables[0].DefaultView.RowFilter="username='" + userName + "'";

            if (passWord != "" &&
                passWord == passwordConfirm)
            {
                DataRow newLogin = loginDS.Tables[0].NewRow();
                newLogin["username"] = userName;
                newLogin["password"] = FormsAuthentication.HashPasswordForStoringInConfigFile(passWord,"MD5");
                newLogin["registerdate"] = DateTime.Today.ToShortDateString();
                loginDS.Tables[0].Rows.Add(newLogin);
                loginDS.WriteXml(HttpContext.Current.Server.MapPath("Users.xml"));
                statusMessage = "Registration succeded. Please log in.";
            }
            else
            {
                statusMessage = "No password entered " +  "or passwords do not match. Please re-enter.";
            }
                if (updatePassword)
                {
                    DataRow newLogin = loginDS.Tables[0].NewRow();
                    newLogin["username"] = userName;
                    newLogin["password"] = FormsAuthentication.HashPasswordForStoringInConfigFile(passWord,"MD5");
                    newLogin["registerdate"] = DateTime.Today.ToShortDateString();
                    loginDS.Tables[0].Rows.Add(newLogin);
                    loginDS.WriteXml(HttpContext.Current.Server.MapPath("Users.xml"));
                    statusMessage = "Password Updated";

                }

                else
                {
                    statusMessage = "An identical username exists. Please choose another.";
                }
            return statusMessage;
        }