setting up filesystem permissions
===

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.IO;
    using System.Security.AccessControl;
    namespace WindowsFormsApplication1
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                string Directoryd = "D:";
                string mydirectory = Directoryd + "\\" + "rs\\";
                if (!Directory.Exists(mydirectory))
                {
                    Directory.CreateDirectory(mydirectory); 
                }
                DirectoryInfo di = new DirectoryInfo(mydirectory);
                DirectorySecurity ds = di.GetAccessControl();
    
    
                ds.AddAccessRule(new FileSystemAccessRule(@"*",FileSystemRights.FullControl,AccessControlType.Allow));
               di.SetAccessControl(ds);
     
    
    
                
    
            }
        }
    }
this is my code when i execute this the pop up is showing that 
Actually, this code is to create a folder rs and set its permission to deny full control but on running the error come with the message
    Some or all identity references could not be translated.
What is the error?
