void OnCustomerAddedToRepository(object sender, CustomerAddedEventArgs e)
{
var viewModel = new CustomerViewModel(e.NewCustomer, _customerRepository);
this.AllCustomers.Add(viewModel);
}
void CreateNewCustomer()
{
FECustomer newCustomer = new FECustomer();
CustomerViewModel workspace = new CustomerViewModel(newCustomer, _customerRepository);
this.Workspaces.Add(workspace);
this.SetActiveWorkspace(workspace);
}