File transfer resume in C#

Question

Hello!

I have done so far a P2P application that has secure chat support and secure file transfer. Now I must program my application to be able to have file transfer resume. For example, if one peer disconnects and then tries to send the file again, the transfer should continue from the point left.

Is that possible in C#? Could you give me some suggestions? Or some links where I can find something about it? I've searched the Internet for this problem a lot, but I haven't found anything satisfactory.

I must add that I don't use FTP or HTTP, the transfer is being made through a random port.

Thanks a lot.