tcpipSocket/TAP/Client/Client.cs

using System.Net;
using System.Net.Sockets;
using System.Text;

namespace Client
{
	internal class Client
	{
		static async Task Main(string[] args)
		{
			Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
			IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 20000);

			await socket.ConnectAsync(endPoint);

			while (true)
			{
				string str = Console.ReadLine() ?? string.Empty;
				byte[] buffer = Encoding.UTF8.GetBytes(str);
				await socket.SendAsync(buffer, SocketFlags.None);
			}
		}
	}
}