windows上的模拟7

我一直在开发一些通过本地域复制文件的应用程序。当我试图在windows XP上用一个完全没有权限的帐户复制文件时，这是在模仿一个有权限的帐户，一切都做得很完美。但是，当我使用与上面在Windows7上模拟相同帐户的相同帐户时，应用程序在第一行上返回"拒绝访问"

我在模拟msdn上使用了相同的代码片段，但这里是我的fileSeeker函数：

    [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    public static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword,
        int dwLogonType, int dwLogonProvider, out SafeTokenHandle phToken);
    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
    public extern static bool CloseHandle(IntPtr handle);
    // Test harness. 
    // If you incorporate this code into a DLL, be sure to demand FullTrust.
    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public impersonateSetting(string userName, string domainName, string password, string pathToSeek)
    {
        SafeTokenHandle safeTokenHandle;
        try
        {
            const int LOGON32_PROVIDER_DEFAULT = 0;
            //This parameter causes LogonUser to create a primary token. 
            const int LOGON32_LOGON_INTERACTIVE = 2;
            // Call LogonUser to obtain a handle to an access token. 
            bool returnValue = LogonUser(userName, domainName, password,
                LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT,
                out safeTokenHandle);
            Console.WriteLine("LogonUser called.");
            if (false == returnValue)
            {
                int ret = Marshal.GetLastWin32Error();
                Console.WriteLine("LogonUser failed with error code : {0}", ret);
                throw new System.ComponentModel.Win32Exception(ret);
            }
            using (safeTokenHandle)
            {
                Console.WriteLine("Did LogonUser Succeed? " + (returnValue ? "Yes" : "No"));
                Console.WriteLine("Value of Windows NT token: " + safeTokenHandle);
                // Check the identity.
                Console.WriteLine("Before impersonation: "
                    + WindowsIdentity.GetCurrent().Name);
                // Use the token handle returned by LogonUser. 
                using (WindowsIdentity newId = new WindowsIdentity(safeTokenHandle.DangerousGetHandle()))
                {
                    using (WindowsImpersonationContext impersonatedUser = newId.Impersonate())
                    {
                        // Check the identity.
                        Console.WriteLine("After impersonation: "
                            + WindowsIdentity.GetCurrent().Name);
                        fileRunner.fileSeeker(pathToSeek, true);
                    }
                }
                // Releasing the context object stops the impersonation 
                // Check the identity.
                Console.WriteLine("After closing the context: " + WindowsIdentity.GetCurrent().Name);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Exception occurred. " + ex.Message);
        }
    }
}
public sealed class SafeTokenHandle : SafeHandleZeroOrMinusOneIsInvalid
{
    private SafeTokenHandle()
        : base(true)
    {
    }
    [DllImport("kernel32.dll")]
    [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
    [SuppressUnmanagedCodeSecurity]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool CloseHandle(IntPtr handle);
    protected override bool ReleaseHandle()
    {
        return CloseHandle(handle);
    }

fileSeeker函数：

    public static void fileSeeker(string paramFrom, bool copySub)
    {
        DirectoryInfo dir = new DirectoryInfo(paramFrom);
        DirectoryInfo[] dirs = dir.GetDirectories();
        try
        {
            FileInfo[] files = dir.GetFiles();
            foreach (FileInfo file in files)
            {
                    string temppath = Path.Combine(paramFrom, file.Name);
                    try
                    {
                        Console.WriteLine("Accessing: " + temppath);
                    }
                    catch
                    {
                        Console.WriteLine("Cant Access to " + temppath);
                    }
            }
            if (copySub)
            {
                foreach (DirectoryInfo subdir in dirs)
                {
                    string temppath = Path.Combine(paramFrom, subdir.Name);
                    fileSeeker(subdir.FullName, copySub);
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
        }
    }
}

谢谢你的帮助！