private void AddCustomer()
{
CustomerViewModel cvm = new CustomerViewModel();
CustomerView dv = new CustomerView();
dv.DataContext = cvm;
dv.ShowDialog();
GetCustomers();
}
private void EditCustomer()
{
CustomerViewModel cvm = new CustomerViewModel(this.SelectedCustomer.CustomerId);
CustomerView cv = new CustomerView();
cv.DataContext = cvm;
cv.ShowDialog();
GetCustomers();
}