Copying files over network (requiring authentication)

Is there some way to authenticate as a local (not network) user in order to copy files over the network in .Net? `net use` is not an option, and I can't seem to get LogonUser to work. Any ideas? [Edit] Here is some code: ``` public class UserImpersonator : IDisposable { private WindowsImpersonationContext _impersonationContext; private IntPtr _userHandle = IntPtr.Zero; [DllImport("advapi32.dll", SetLastError = true)] private static extern bool LogonUser( string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, out IntPtr phToken ); [DllImport("kernel32.dll", SetLastError = true)] private static extern bool CloseHandle(IntPtr hHandle); public UserImpersonator(string username, string password) { LogonUser(username, "", password, (int)LogonType.LOGON32_LOGON_NETWORK, (int)LogonProvider.LOGON32_PROVIDER_DEFAULT, out _userHandle); _impersonationContext = WindowsIdentity.Impersonate(_userHandle); } public void Dispose() { CloseHandle(_userHandle); _impersonationContext.Undo(); } private enum LogonType : int { LOGON32_LOGON_INTERACTIVE = 2, LOGON32_LOGON_NETWORK = 3, LOGON32_LOGON_BATCH = 4, LOGON32_LOGON_SERVICE = 5, LOGON32_LOGON_UNLOCK = 7, LOGON32_LOGON_NETWORK_CLEARTEXT = 8, LOGON32_LOGON_NEW_CREDENTIALS = 9, } private enum LogonProvider { LOGON32_PROVIDER_DEFAULT = 0, } } ``` When I wrap the `File.Copy` operation in `using(new UserImpersonator(username, password))`, I get: System.IO.IOException: Logon failure: unknown user name or bad password. If, however, I first try to connect to the share in explorer (entering the authentication info when it asks for it), the `File.Copy` works. It appears that the above code doesn't do anything at all.