private void button5_Click(object sender, RoutedEventArgs e)
{
Window1 w = new Window1();
}
private void Registration_Click(object sender, RoutedEventArgs e)
{
Window1 Window1 = new Window1();
Window1.ShowDialog();
}
private void MenuItem_Click_4(object sender, RoutedEventArgs e)
{
var about = new Window1();
about.Show();
}