Realization of point-to-point file transfer with socket

The System.sockes namespace implements the Berkeley socket interface. Through this class, we can implement the message transmission and send between the network computer. And in the subject that I'm going to discuss below, we're going to talk about implementing file transfers with a set of nodes. This method is different from the FTP protocol, which requires a dedicated server and client to use the FTP method. There is no doubt that the point-to-point file transfer we are trying to implement is too complex. Here, we implement a lightweight approach to point-to-point file transfer, which achieves file sharing for any two computers on the intenet.
Before two computers transfer files, it is necessary to have a computer set up a nested node and bind a fixed port, and on this port listen for a connection request from another computer.
Socket = new Socket (addressfamily.internetwork,sockettype.stream, protocoltype.tcp);
Socket. Blocking = true;
IPEndPoint computernode1 = new IPEndPoint (serveripadress, 8080);
Socket. Bind (COMPUTERNODE1);
Socket. Listen (-1);
When a connection request is made by another computer, the requested computer assigns a thread to each connection request for processing file transfers and other services.
while (true)
{
Clientsock = socket. Accept ();
if (Clientsock. Connected)
{
Thread TC = new Thread (new ThreadStart (listenclient));
Tc. Start ();
}
}

The following code shows how the Listenclient method handles requests sent over from another computer. First, make a judgment on the request string sent over, see what kind of request it is, and then decide on the appropriate processing method.
void Listenclient ()
{
Socket sock = Clientsock;
Try
{
while (sock!= null)
{
byte[] RECs = new byte[32767];
int rcount = sock. Receive (recs,recs. length,0);
String message = System.Text.Encoding.ASCII.GetString (RECs);
Processing of message, parsing request characters and parameters stored in cmdlist