HpSocket是一個輕量級的高性能網絡庫，適用于C#項目中的網絡編程。以下是一個簡單的HpSocket應用案例，展示了如何使用HpSocket進行網絡通信：

1. 引入HpSocket庫：

首先，需要在C#項目中引入HpSocket庫。可以通過NuGet包管理器搜索HpSocket并安裝。

2. 創建服務器端：

using System;
using HPSocket;

namespace HpSocketDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Listener listener = new TcpPackServer();
            listener.Address = "0.0.0.0";
            listener.Port = 5555;

            listener.OnPrepareListen += (sender, listen) =>
            {
                Console.WriteLine($"Start listening on {listener.Address}:{listener.Port}");
            };

            listener.OnAccept += (sender, connId, client) =>
            {
                Console.WriteLine($"Client {connId} connected");

                client.Send("Welcome to the server!");
            };

            listener.OnReceive += (sender, connId, data) =>
            {
                Console.WriteLine($"Received data from client {connId}: {data}");

                listener.Send(connId, "Server received data: " + data);
            };

            listener.OnClose += (sender, connId, operation, errorCode) =>
            {
                Console.WriteLine($"Client {connId} disconnected");
            };

            listener.Start();

            Console.ReadLine();

            listener.Stop();
            listener.Destroy();
        }
    }
}

3. 創建客戶端：

using System;
using HPSocket;

namespace HpSocketDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            TcpPackClient client = new TcpPackClient();

            client.OnConnect += (sender) =>
            {
                Console.WriteLine("Connected to server");

                client.Send("Hello, server!");
            };

            client.OnReceive += (sender, data) =>
            {
                Console.WriteLine($"Received data from server: {data}");
            };

            client.OnClose += (sender, operation, errorCode) =>
            {
                Console.WriteLine("Disconnected from server");
            };

            client.Connect("127.0.0.1", 5555);

            Console.ReadLine();

            client.Disconnect();
        }
    }
}

以上示例展示了一個簡單的HpSocket應用案例，包括了服務器端和客戶端的代碼。在實際項目中，可以根據具體需求進行更復雜的網絡通信操作。HpSocket提供了豐富的事件和方法，可以方便地進行網絡編程。