Asynchronous TCP proxy in C#

TcpProxy.cs

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

namespace HolePunchTest
{
    public class TcpProxy
    {
        public TcpClient Client { get; set; }
        public TcpClient HolepunchClient { get; private set; }

        public TcpProxy(TcpClient client)
        {
            Client = client;
            HolepunchClient = new TcpClient();
        }

        public async Task DoDataExchange(string address, int port)
        {
            await HolepunchClient.ConnectAsync(address, port);
            Task T1 = Task.Factory.StartNew(async () => { await DataExchangeTask(Client, HolepunchClient); });
            Task T2 = Task.Factory.StartNew(async () => { await DataExchangeTask(HolepunchClient, Client); });
        }

        async Task DataExchangeTask(TcpClient target, TcpClient destination)
        {
            int bytesRead = 0;
            byte[] recvbuf = new byte[8192];
            do
            {
                bytesRead = await target.GetStream().ReadAsync(recvbuf, 0, recvbuf.Length);
                await destination.GetStream().WriteAsync(recvbuf, 0, bytesRead);
            } while (bytesRead != 0);
        }
    }
}