public void DeleteCustomer()
{
Console.WriteLine("Which customer would you like to delete?");
string firstName = Console.ReadLine();
_customerRepo.RemoveCustomerByFirstName(firstName);
List <CustomerClass> customers = _customerRepo.getList();
int index = customers.FindIndex(x => x.FirstName == firstName);
string removeCustomer = Console.ReadLine();
customers.RemoveAt(index);
}