private void ListContacts()
{
Console.WriteLine("List Contacts.");
Contact[] contacts = directory.GetAll();
if (contacts == null || contacts.Length == 0)
{
Console.WriteLine("No Contact Found.");
}
else
{
for (int i = 0; i < contacts.Length; i++)
{
Contact c = contacts[i];
Console.WriteLine(c.GetFullName());
Console.WriteLine(c.Phone);
Console.WriteLine(c.Email);
Console.WriteLine("====================");
}
}
}