impersonating the user initiating an action over the network

I am trying to write a simple server/client application that will perform operations on the server using the permissions of the person running the client.

I have saught to do this by serializing a WindowsIdentity object representing the client and sending it through a NetworkStream that is connected to the server (which will run as a windows service).

Then I attempt to impersonate the user on the server using the WindowsIdentity object.

Well, aparently the WindowsIdentity object does not contain a full set of credentials because once it gets to the server it simply sais that the handle is bad.

I can see how this situation would happen, but what to I need to do to transmit the user's security token to another computer so that I can impersonate the user

Alternately, is there some other way that anyone knows of to acomplish my goal as I have presented it here

If possible I would like to know an object or member name or a topic title related in some way to this process so that I can search for it in the MSDN library.

Jake Wagner, Sr. IT Tech
Computer Information Science Department
American River College