public ManagerMenu(IRepository repo)
 {
     this.repo          = repo;
     this.locationMenu  = new LocationMenu(repo);
     this.productMenu   = new AddProductMenu(repo);
     this.inventoryMenu = new InventoryMenu(repo);
 }
 public AddProductMenu(IRepository repo)
 {
     this.repo           = repo;
     this.productService = new ProductService(repo);
     this.locationMenu   = new LocationMenu(repo);
 }