Make distinction between a TcpClient in c#

Question

How can I as a server make distinctions between a TcpClient that connects to me? As a Client, do I always have to send a username or something from which the server can know who I am?

Answer 1

I typicly use data transmited client side to the serve to identify the client. Identifiers i use are :

Lan and Wan ip addresses, computername, username, operating system,

in addition to your comments i would like to suggest creating a client class inside the server that handles variables that have already been transmited by the client so you don't have to resend username and so on