디렉토리생성시 중복디렉토리 네임 방지

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
public partial class Test_CreateForder : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {

        string ForderURL = @"D:\WEBSITE\PHOTO_DATA\";
        string ForderURLToTal = @"D:\WEBSITE\PHOTO_DATA\" + this.TextBox1.Text;
        string ForderName = this.TextBox1.Text;
        string ReadForder = string.Empty;;
        //Response.Write("들어가기전"+ForderName+"<br>-------------------------------<Br>");
        try
        {
            int AddForderNumber = 1;
            //중복디렉토리 있다 ㅜ_ㅜ
            if (!Directory.Exists(ForderURL + ForderName))
            {
                ReadForder = ForderName;
                //Response.Write("원래이름 통과!<br>");

            }
            else
            {

                while (Directory.Exists(ForderURL + ForderName))
                {

                    string Temp = ForderName + "(" + AddForderNumber.ToString() + ")";
                    AddForderNumber++;
                    if (!Directory.Exists(ForderURL + Temp))
                    {
                        //만약 새로만든 디렉토리 이름으로  디렉토리가 없다면~!
                        ReadForder = Temp;
                        break;
                    }
                                 }
            }

            System.IO.Directory.CreateDirectory(ForderURL + ReadForder );
                  }
        catch (Exception ex) {

                     Response.Write(ex.ToString());
        }

    }
}