static void Main()
{
var container = new IoCContainer();
var viewModel = container.Resolve<CashRegisterViewModel>();
var view = new CashRegisterWindow();
view.DataContext = viewModel;
view.WindowStartupLocation = WindowStartupLocation.CenterScreen;
// view.WindowStyle = WindowStyle.None;
//view.WindowState = WindowState.Maximized;
var app = new Application();
app.Run(view);
}