在C#中，可以使用System.Net.Sockets命名空間下的TcpClient類來創(chuàng)建一個TCP服務(wù)器。以下是一個簡單的異步TCP服務(wù)器示例：

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;

class AsyncTcpServer
{
    private TcpListener listener;
    private Task<TcpClient> clientTask;

    public async Task StartAsync()
    {
        listener = new TcpListener(IPAddress.Any, 8080);
        listener.Start();

        Console.WriteLine("服務(wù)器已啟動，等待客戶端連接...");

        clientTask = listener.AcceptTcpClientAsync();
    }

    public async Task HandleClientAsync(TcpClient client)
    {
        Console.WriteLine("客戶端已連接: " + client.RemoteEndPoint);

        await Task.Run(async () =>
        {
            try
            {
                await client.GetStreamAsync();
                byte[] buffer = new byte[1024];
                int bytesRead;
                while ((bytesRead = await client.ReceiveAsync(buffer)) > 0)
                {
                    string data = Encoding.UTF8.GetString(buffer, 0, bytesRead);
                    Console.WriteLine("接收到數(shù)據(jù): " + data);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("處理客戶端時出錯: " + ex.Message);
            }
        });
    }

    public void StopAsync()
    {
        if (clientTask != null)
        {
            clientTask.Wait();
        }

        listener.Stop();
    }
}

class Program
{
    static void Main(string[] args)
    {
        AsyncTcpServer server = new AsyncTcpServer();
        server.StartAsync();

        Console.WriteLine("服務(wù)器已啟動，等待客戶端連接...");
        Console.ReadLine();

        server.StopAsync();
    }
}

這個示例創(chuàng)建了一個異步的TCP服務(wù)器，監(jiān)聽8080端口。當(dāng)有客戶端連接時，它會將客戶端連接到一個新的線程中，以便同時處理多個客戶端。當(dāng)客戶端斷開連接時，服務(wù)器會停止監(jiān)聽。