根据进程令牌来完成计算机之间文件拷贝

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    using System.Runtime.InteropServices; //添加引用

//引用系统win32 Api

        //http://msdn.microsoft.com/zh-cn/library/aa378184(v=VS.85)    public class IdentityScope : IDisposable    {        private bool disposed;        [DllImport("Advapi32.dll")]        private static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, LogonType dwLogonType, LogonProvider dwLogonProvider, out IntPtr phToken);        [DllImport("Advapi32.DLL")]        private static extern bool ImpersonateLoggedOnUser(IntPtr hToken);        [DllImport("Advapi32.DLL")]        private static extern bool RevertToSelf();        [DllImport("Kernel32.dll")]        private static extern int GetLastError();        public IdentityScope(string domain, string userName, string password)            : this(domain, userName, password, LogonType.Interactive, LogonProvider.Default)        {        }        public IdentityScope(string domain, string userName, string password, LogonType logonType, LogonProvider logonProvider)        {            if (string.IsNullOrEmpty(userName))                throw new ArgumentNullException("userName");            if (string.IsNullOrEmpty(domain))                domain = ".";            IntPtr token;            int errorCode = 0;            if (LogonUser(userName, domain, password, logonType, logonProvider, out token))            {                if (!ImpersonateLoggedOnUser(token))                    errorCode = GetLastError();            }            else                errorCode = GetLastError();            if (errorCode != 0)                throw new System.ComponentModel.Win32Exception(errorCode);        }        ~IdentityScope()        {            Dispose(false);        }        protected virtual void Dispose(bool disposing)        {            if (!disposed)            {                if (disposing)                {                }                RevertToSelf();                disposed = true;            }        }        public void Dispose()        {            Dispose(true);            GC.SuppressFinalize(this);        }    }    public enum LogonType : uint    {        Interactive = 2,        Network = 3,        Batch = 4,        Service = 5,        Unlock = 7,        NetworkClearText = 8,        NewCredentials = 9    }    public enum LogonProvider : uint    {        Default = 0,        WinNT35 = 1,        WinNT40 = 2,        WinNT50 = 3,    }    public enum ProcessCode : uint    {        Result = 1,        Success = 2,        Failure = 4            }

    public class Program    {        static void Main()        {            try            {                string IpAddr = "192.168.1.23";                string souceFileName = "D:\\abc.txt";                string targetFileName = "\\192.168.1.23\\D$\\abc.txt";                string UserName = "Administrator";                string Password = "123456";                //信令拷beike                using (new IdentityScope(IpAddr                    , UserName                    , Password                    , LogonType.NewCredentials                    , LogonProvider.WinNT50))                {                    System.IO.File.Copy(souceFileName, targetFileName, true);                }            }            catch (Exception e)            {            }        }    }

更多信息参见:http://msdn.microsoft.com/zh-cn/library/aa378184(v=VS.85)