RDP Windows 7 nur eine Session erlauben

using System;
using System.IO;
using System.Security.Principal;
using System.Diagnostics;

namespace RunSessionKiller
{
    class Program
    {
        static void Main(string args)
        {
            WindowsIdentity currentUser = System.Security.Principal.WindowsIdentity.GetCurrent();
            string filename = "c:\\Users\\Public\\user" + DateTime.Now.ToString("yyyyMMddh");  

            if (File.Exists(filename))
                File.Delete(filename);

            // Write the string to a file.
            System.IO.StreamWriter file = new System.IO.StreamWriter(filename);
            file.WriteLine(currentUser.Name);
            file.Close();
        }
    }
}

using System;
using System.Security.Principal;
using System.Security.Permissions;
using System.IO;
using Cassia;

namespace SessionKiller
{

    public class Program
    {
        public static void Main()
        {
            string filename = "c:\\Users\\Public\\user" + DateTime.Now.ToString("yyyyMMddh");  
            if (File.Exists(filename))
            {
                StreamReader file = new StreamReader(filename);
                string username = file.ReadLine();
                file.Close();

                if (username.Length > 0)
                {
                    ITerminalServicesManager manager = new TerminalServicesManager();
                    ITerminalServer localhost = manager.GetLocalServer();
                    WindowsIdentity currentUser = System.Security.Principal.WindowsIdentity.GetCurrent();
                    foreach (ITerminalServicesSession session in localhost.GetSessions())
                    {
                        NTAccount account = session.UserAccount;
                        if (account != null)
                        {
                            if (username.ToLower() != account.ToString().ToLower())
                            {
                                session.Logoff();
                            }
                        }
                    }
                    File.Delete(filename);
                }
            }
            else
            {
                System.Console.WriteLine("Could not read file: " + filename);  
                System.Console.ReadKey();
            }
        }
    }
}