private void AddNewItem()
{
domain.Bill dmBill = new domain.Bill();
BillViewModel vm = CreateVM(this.container, dmBill);
this.billService.Add(dmBill);
this.billList.Add(vm);
this.SelectedItem = vm;
}
public BillViewModel(BillService billService,
ProductService productService,
domain.Bill domainBill,
IEventAggregator eventAggregator)
{
this.eventAggregator = eventAggregator;
this.billService = billService;
this.productService = productService;
this.domainBill = domainBill;
this.domainBill.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(domainBill_PropertyChanged);
this.BillItemVMList = BuildBillItemVmList(this.domainBill);
}