public void WhenISearchTheSameWith(string searchcriteria)
{
switch (searchcriteria)
{
case "firstname":
result = addressbook.GetContactByFirstName(contact.FristName);
break;
case "lastname":
result = addressbook.GetContactByLastName(contact.LastName);
break;
case "phonenumber":
result = addressbook.GetContactByPhoneNumber(contact.PhoneNumber);
break;
default:
break;
}
}