private void BtnFinancialAccountClick(object sender, RoutedEventArgs e)
 {
     var dialog = new TreeViewDialog();
     dialog.ShowDialog();
     var fa = dialog.SelectedItems as FinancialAccount;
     if (fa != null)
     {
         ((PaymentUsageVM)VM).FinancialAccountId = fa.Id;
         ((PaymentUsageVM)VM).FinancialAccountName = fa.Name;
     }
 }
 private void BtnFinancialAccountClick(object sender, RoutedEventArgs e)
 {
     var dialog = new TreeViewDialog();
     dialog.ShowDialog();
     var financialAccount = dialog.SelectedItems as FinancialAccount;
     if (financialAccount != null)
     {
         VM.SetPropertyValue("SelectedFinancialAccountId", financialAccount.Id);
         VM.SetPropertyValue("FinancialAccountName", financialAccount.Name);
     }
 }