public CheckWindow(TotalPurchase totalPurchase, AfterPayMoney afterPayMoney)
{
this.totalPurchase = totalPurchase;
this.afterPayMoney = afterPayMoney;
InitializeComponent();
this.tbShouldMoney.Text = totalPurchase.TotalMoney.ToString();
this.txtPaidMoney.Text = this.tbShouldMoney.Text;
this.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Render, new Action(() => this.txtPaidMoney.Focus()));
this.txtPaidMoney.SelectionStart = this.txtPaidMoney.Text.Length;
}
