Getting Contacts from ACT CRM

public ContactList GetContacts(SortCriteria sortCriteria);

//Example 1
ContactList cList = ActFwk.Contacts.GetContacts(null);

//Example 2
//This example populates a ContactList sorted by the contacts Last Name, First Name.
//It then displays the name of the first contact in the list.
ContactFieldDescriptor cfd1 = ActFwk.Contacts.GetContactFieldDescriptor("TBL_CONTACT.LASTNAME", true);
ContactFieldDescriptor cfd2 = ActFwk.Contacts.GetContactFieldDescriptor("TBL_CONTACT.FIRSTNAME",true);
SortCriteria[] sCriteria={new SortCriteria(cfd1,ListSortDirection.Ascending),
new SortCriteria(cfd2,ListSortDirection.Ascending)
};
ContactList cList = ActFwk.Contacts.GetContacts(sCriteria);
Contact cContact = cList[0];
MessageBox.Show(cContact.FullName);