private void btnWebView_Click(object sender, RoutedEventArgs e)
{
MainWindowFram.Navigate(typeof(myWebview));
}
private void btnMedia_Click(object sender, RoutedEventArgs e)
{
MainWindowFram.Navigate(typeof(MyVideoPlayer));
}
private void button_Click(object sender, RoutedEventArgs e)
{
MainWindowFram.Navigate(typeof(ImgView));
}