How to pass not simple types using .NET Remoting

can't count how many .NET remoting tutorials and book excerpts i read.

Every single time the example involves a chat client passing strings or

some other example where strings, ints, and simple user defined types

are begin passed. I am looking for an example which shows me how to

pass pointer types, like most things in .NET library. For example, I

want to pass a FileInfo or FileStream object from server to client. I

tried that, it didn't work. Someone told me that's because

System.IO.FileStream object, for example, is a pointer to a memory

location which would have meaning on the machine it was instantiated

on. If I pass that pointer to another machine than that pointer would

have no meaning on that machine.

But I did check and FileInfo

object derives from MarshalByRefObject, so I thought that means it

could be used accross machine boundries.

I am trying to write

the simplest and non-dirties of file transfer apps where the client

passes a FileStream to a server, server reads it and saves it localy.

Simple stuff. Cannot figure it out.

Here is a simple client server app where the server accepts a FileInfo object and shows its FileName property, simple. The server also accepts a string object and shows it. The server will have no problems displaying the string or the FileName of a FileInfo object when the programs are run on the same machine, using "tcp://localhost" for connection. Howerver, put the server and client on different machines, and server will show the string no problems, but it will hang when it tries to access FileInfo object:

Client:
-
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;
using System.IO;

namespace RemotingTest
{
class Program
{
static void Main(string[] args)
{
TcpChannel tcpChannel = new TcpChannel();
ChannelServices.RegisterChannel(tcpChannel, false);

RemotingConfiguration.RegisterWellKnownClientType(
typeof(ServerInterface),
"tcp://www.server-ip.com/Server"); // change to appropriate address here

ServerInterface server = new ServerInterface();

server.ShowFileInfo("C:\\test.txt"); // works

server.ShowFileInfo(new FileInfo("C:\\test.txt")); // hangs
}
}
}

Server interface:

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace RemotingTest
{
public class ServerInterface: MarshalByRefObject
{
public void ShowFileInfo(string filename)
{
Console.WriteLine(filename);
}

public void ShowFileInfo(FileInfo fileInfo)
{
Console.WriteLine(fileInfo.Name);
}
}
}

Server:

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;

namespace RemotingTest
{
class Program
{
static void Main(string[] args)
{
TcpChannel tcpChannel = new TcpChannel(1024);
ChannelServices.RegisterChannel(tcpChannel, false);