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using System.Windows.Forms;
using System.Net.Sockets;
using System.Threading;
using System.IO;
using System.Net;//使用IPAredd类，IPHostEntry类
namespace QQ
{
public partial class Tcpclient : Form
{
private StreamWriter write;
private NetworkStream stream;
private TcpClient tcpclient;
public Tcpclient（）
{
InitializeComponent（）;
}
private void button1_Click（object sender, EventArgs e）
{
try
{
tcpclient = new TcpClient（AddressFamily.InterNetwork）;
tcpclient.Connect（"127.0.0.1",8000）;
stream = tcpclient.GetStream（）;
write = new StreamWriter（stream）;
write.WriteLine（this.textBox1.Text）;
write.Flush（）;
}
catch
{
}
}
}
}