private async void m_PauseBtn_Click(object sender, RoutedEventArgs e)
{
if (mState == State.Started && mISession != null)
{
m_PauseBtn.IsEnabled = false;
m_StopBtn.IsEnabled = true;
await mISession.pauseSessionAsync();
m_StartStopBtn.IsEnabled = true;
mState = State.Paused;
}
}