public Customer[] ListCustomers(Transaction context)
{
var customers = new HashSet <Customer>();
if (Flights != null)
{
foreach (Customer c in Flights.ListCustomers(context))
{
customers.Add(c);
}
}
if (Cars != null)
{
foreach (Customer c in Cars.ListCustomers(context))
{
customers.Add(c);
}
}
if (Rooms != null)
{
foreach (Customer c in Rooms.ListCustomers(context))
{
customers.Add(c);
}
}
var cs = new Customer[customers.Count];
customers.CopyTo(cs);
return(cs);
}