public int InsertPerson(PersonDto data)
{
var newId = 1;
if (_list.Count > 0)
newId = _list.Max(_ => _.Id) + 1;
data.Id = newId;
_list.Add(data);
return newId;
}
public void UpdatePerson(PersonDto data)
{
var entity = GetPerson(data.Id);
entity.FirstName = data.FirstName;
entity.LastName = data.LastName;
}