private void btnTimeView_Click(object sender, RoutedEventArgs e)
{
var timeViewWindow = new TimeViewWindow();
timeViewWindow.Show();
}
void timer_Tick(object sender, EventArgs e)
{
if (timeWindow != null)
{
timeWindow.Close();
}
timeWindow = new TimeViewWindow();
timeWindow.WindowStartupLocation = WindowStartupLocation.CenterScreen;
timeWindow.Show();
}