Remoting

[Sadranet]

I want to send an object from Client1 to Client2 in Network .(Visual Studio 2008)
I need to added these refrences :

1. using System.Runtime. Remoting;
2. using System.Runtime. Remoting.Channe ls;
3. using System.Runtime. Remoting.Channe ls.Http;

But my Program unknown "Http" in Line 3 .
Please help me or send to me a sample of this subject .

Thanks