public class IdentityScope : IDisposable    {        /// <summary>        /// 登录一个新用户        /// </summary>        /// <param name="pszUsername"></param>        /// <param name="pszDomain"></param>        /// <param name="pszPassword"></param>        /// <param name="dwLogonType"></param>        /// <param name="dwLogonProvider"></param>        /// <param name="phToken"></param>        /// <returns></returns>        [DllImport("advapi32.dll", SetLastError = true)]        static extern bool LogonUser(string pszUsername, string pszDomain, string pszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);        //closes open handes returned by LogonUser            [DllImport("kernel32.dll", CharSet = CharSet.Auto)]        extern static bool CloseHandle(IntPtr handle);        /// <summary>        /// 让调用线程模拟一个用户        /// </summary>        /// <param name="hToken"></param>        /// <returns></returns>        [DllImport("Advapi32.DLL")]        static extern bool ImpersonateLoggedOnUser(IntPtr hToken);        /// <summary>        ///终止模拟的客户应用程序         /// </summary>        /// <returns></returns>        [DllImport("Advapi32.DLL")]        static extern bool RevertToSelf();        public IdentityScope(string Username, string Domain, string Password)        {            // initialize tokens                IntPtr pExistingTokenHandle = new IntPtr(0);            IntPtr pDuplicateTokenHandle = new IntPtr(0);            try            {                // get handle to token                    bool bImpersonated = LogonUser(Username, Domain, Password, LOGON32_LOGON_NEWCREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref pExistingTokenHandle);                if (true == bImpersonated)                {                    if (!ImpersonateLoggedOnUser(pExistingTokenHandle))                    {                        int nErrorCode = Marshal.GetLastWin32Error();                        throw new Exception("ImpersonateLoggedOnUser error;Code=" + nErrorCode);                    }                }                else                {                    int nErrorCode = Marshal.GetLastWin32Error();                    throw new Exception("LogonUser error;Code=" + nErrorCode);                }            }            finally            {                // close handle(s)                    if (pExistingTokenHandle != IntPtr.Zero)                    CloseHandle(pExistingTokenHandle);                if (pDuplicateTokenHandle != IntPtr.Zero)                    CloseHandle(pDuplicateTokenHandle);            }        }        const int LOGON32_PROVIDER_DEFAULT = 0;        const int LOGON32_LOGON_NEWCREDENTIALS = 9;               private bool disposed;        public void Dispose()        {            Dispose(true);        }        protected virtual void Dispose(bool disposing)        {            if (!disposed)            {                RevertToSelf();                disposed = true;            }        }          }   

  using (IdentityScope iss = new IdentityScope("登录服务器用户名", "服务器IP", "登录服务器密码"))            {               //连接服务器后，按正常的操作来做你想要的操作！                           }