private void button1_Click(object sender, System.EventArgs e)
{
if (dataSendThread == null || !dataSendThread.IsAlive)
{
dataSendThread = new Thread(RunDataSend) { IsBackground = true, Name = _client ? "ClientSendThread" : "ServerSendThread" };
startTime = Environment.TickCount;
dataSendThread.Start();
}
}