private void btnEdit_Click(object sender, RoutedEventArgs e)
        {
            PaSViewModel pas = (PaSViewModel)ViewModel;

            if ((ProblemVO) lstProblems.SelectedItem != null)
            {
                int problemId = ((ProblemVO) lstProblems.SelectedItem).ProblemID;

                WizardViewModel wvm = new WizardViewModel(null);
                wvm.InitializeEdit(problemId);
                new WizardView(wvm).ShowDialog();

                pas.RefreshProblemList();                
            }
        }   
 public WizardView(WizardViewModel wizardViewModel)
 {
     InitializeComponent();
     DataContext = wizardViewModel;
 }