void listen()
{
server = System.Net.Sockets.TcpListener.Create(port);
server.Start();
Console.Write($"Listening at {port}...");
do
{
var serverside_client = server.AcceptTcpClient();
var sender = new MsgSender(serverside_client);
senders.Add(sender);
sender.Start();
Console.WriteLine("\nClient connected");
} while (true);
}