psp-csharp-03-socket/04-SocketClienteDatos/Form1.cs

using System;
using System.Diagnostics;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Windows.Forms;

namespace _04_SocketClienteDatos {
  public partial class Form1 : Form {
    public Form1() {
      InitializeComponent();
    }

    private void Button1_Click(object sender, EventArgs e) {
      Socket miSocketCliente = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
      IPEndPoint miServidor = new IPEndPoint(IPAddress.Parse(this.textBox1.Text), 2000);
      try {
        miSocketCliente.Connect(miServidor);
        Debug.WriteLine("Conectado con éxito");


        //envío de datos
        byte[] textoEnviar;
        textoEnviar = Encoding.Default.GetBytes(this.textBox2.Text);
        miSocketCliente.Send(textoEnviar, 0, textoEnviar.Length, SocketFlags.None);
        Debug.WriteLine("Texto enviado con éxito");

        //cerrar
        miSocketCliente.Close();
      }
      catch (Exception error) {
        Debug.WriteLine("Error: " + error.ToString());
      }
    }
  }
}