public Business(IRepositoryProduct irepProd, IRepositoryCustomerOrder irepCust)
 {
     _irepProducts  = irepProd;
     _irepCustomers = irepCust;
 }
 public Business()
 {
     _irepProducts  = new Repository() as IRepositoryProduct;
     _irepCustomers = new Repository() as IRepositoryCustomerOrder;
 }