tcpipSocket/Chat/Core/PClient.cs

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

namespace Core
{
	public class PClient
	{
		private Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
		private EndPoint endPoint;

		public PClient(string ip, int port)
		{
			endPoint = new IPEndPoint(IPAddress.Parse(ip), port);
		}

		public async Task StartAsync()
		{
			await socket.ConnectAsync(endPoint);
			while (true)
			{
				string str = Console.ReadLine() ?? string.Empty;
				byte[] dataBuffer = Encoding.UTF8.GetBytes(str);
				byte[] headerBuffer = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)dataBuffer.Length));

				await socket.SendAsync(headerBuffer, SocketFlags.None);
				await socket.SendAsync(dataBuffer, SocketFlags.None);
			}
		}
	}
}