Hello. I've recently begun learning C# but have encountered an annoying problem. Every variable I want available to all functions in my program I have to put a "static" in front of and also every function. What I'd like to know is how to avoid this, if possible?

Also, small side question: creating public variables inside functions?

This is what my program looks like right now, and I want to basically keep it like that, without having to add "static" everywhere:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Threading;
using System.Net.Sockets;

namespace NetworkExercise
{
class Client
{
    public IPAddress addr;
    public int port;
    public string name;
    public Thread thread;
    public TcpClient tcp;
    public NetworkStream stream;

    public Client(IPAddress addr, int port, string name, NetworkStream stream)
    {
    }
}
class Program
{
    //NETWORK
    TcpListener tcpListener;
    Thread listenThread;
    ASCIIEncoding encoder = new ASCIIEncoding();
    //DATA
    byte[] buffer = new byte[4096];
    string servIp;
    int servPort;
    //CLIENT MANAGEMENT
    int clientNum;

    static void Main(string[] args)
    {
        beginConnect();
    }
    public void beginConnect()
    {
        Console.Write("Server IP (leave blank if you're the host): ");
        servIp = Console.ReadLine();
        Console.Write("Port: ");
        servPort = Console.Read();

        tcpListener = new TcpListener(IPAddress.Any, servPort);
        listenThread = new Thread(new ThreadStart(listenForClients));
        listenThread.Start();
    }
    public void listenForClients()
    {
        tcpListener.Start();

        Console.WriteLine("Listening for clients...");

        while (true)
        {
            Client cl = new Client(null, servPort, null, null);
            cl.tcp = tcpListener.AcceptTcpClient();
            ThreadStart pts = delegate { handleClientCom(cl); };
            cl.thread = new Thread(pts);
            cl.thread.Start();
        }
    }
    public void handleClientCom(Client cl)
    {
        cl.stream = cl.tcp.GetStream();
    }

}

}