private void btnWakeUp_Click(object sender, EventArgs e) { using (UdpClientConnection client = new UdpClientConnection()) { client.NetworkStream = new NetworkStream(); client.Open(System.Net.IPAddress.Broadcast, 9); client.Broadcast(); byte[] buf = GetWakeUpPacket(edtMAC.Text); client.WriteBytes(buf, 0, buf.Length); } MessageBox.Show("Done"); }