public virtual void UpdatePersons(Person[] persons, Person[] deletedPersons)
{
if (persons == null || persons.Length == 0)
{
return;
}
if (ContactGroup == null)
{
AddContactGroup();
foreach (var person in persons)
{
ContactGroup.AddPerson(person.Name);
}
return;
}
ContactGroup.UpdatePersons(persons, deletedPersons);
}