Netzlaufwerk als anderer Benutzer verbinden und benutzen

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Globalization;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string args)
        {
            Process P = new Process();
            //P.StartInfo.RedirectStandardOutput = true;
            P.StartInfo.UseShellExecute = false;
            P.StartInfo.LoadUserProfile = true;
            P.StartInfo.UserName = "Administrator";  
            P.StartInfo.Domain = "RECHNERNAME";  
            System.Security.SecureString password = new System.Security.SecureString();
            string pw = "MeinPasswort";  
            foreach (char c in pw)
                password.AppendChar(c);
            P.StartInfo.Password = password;

            //Net Use
            P.StartInfo.FileName = Environment.SystemDirectory + "\\cmd.exe";  
            P.StartInfo.Arguments = "/k net use y: \\\\SR1NV99\\d$\\DSL-Snapshots ADMINPASSWORT /USER:SR1NV99\\Administrator /PERSISTENT:yes";  
            Console.WriteLine(P.StartInfo.Arguments);
            P.Start();
            //Console.WriteLine(P.StandardOutput.ReadToEnd());
            P.WaitForExit();

            //Check
            //Console.WriteLine(Directory.Exists("Y:\\")); 

            //Snapshot
            P.StartInfo.FileName = "C:\\Local\\csharpsnap\\snapshot.exe";  
            P.StartInfo.Arguments = "C: Y:\\test.sna";  
            Console.WriteLine(P.StartInfo.Arguments);
            P.Start();
            //Console.WriteLine(P.StandardOutput.ReadToEnd());
            P.WaitForExit();

            //Net Use Del
            //P.StartInfo.FileName = Environment.SystemDirectory + "\\cmd.exe"; 
            //P.StartInfo.Arguments = "/k net use y: /del"; 
            //Console.WriteLine(P.StartInfo.Arguments);
            //P.Start();
            ////Console.WriteLine(P.StandardOutput.ReadToEnd());
            //P.WaitForExit();

            Console.ReadLine();

        }
    }
}