/// <summary>
/// Generates person with the associated latest revision of firm
/// </summary>
/// <param name="person"></param>
/// <param name="firms">List of firms, there should only be one instance of each firm in this list</param>
/// <returns></returns>
public DisplayPerson GetDisplayPerson(Person person, string site, Seminar seminar = null)
{
Check.Require(person != null, "person is required.");
var displayPerson = new DisplayPerson() {Person = person};
var reg = seminar == null ? person.GetLatestRegistration(site) : person.SeminarPeople.Where(a=>a.Seminar == seminar).FirstOrDefault();
if (reg == null) return displayPerson;
displayPerson.Seminar = reg.Seminar;
displayPerson.Firm = reg.Firm;
displayPerson.Title = reg.Title;
return displayPerson;
}
