private void button_Click(object sender, RoutedEventArgs e)
{
State = Pinger.ConnectionStates.Unkn;
backgroundWorker.RunWorkerAsync(new Pinger(textBox.Text));
}
void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
if (e.UserState is IPStatus)
State = (((IPStatus)e.UserState == IPStatus.Success) ? Pinger.ConnectionStates.Succ : Pinger.ConnectionStates.Fail);
}