private void btBack_Click(object sender, RoutedEventArgs e)
{
Partselection partselection = new Partselection(); //창전환
Close();
partselection.ShowDialog();
}
private void Button_Click(object sender, RoutedEventArgs e)
{ //시작하기 버튼
ID = main.ID;
Partselection partselection = new Partselection(this); //창 전환
Close();
partselection.ShowDialog();
}