Наследование: IEntity
 public void MarkCaseAsInactive(Case @case)
 {
     @case.Status = CaseStatus.Inactive;
     _session.Update(@case);
 }
 public Case Create(string someExistingNumber)
 {
     var @case = new Case {CellPhoneNumber = someExistingNumber, LastActivity = SystemDateTime.Now()};
     _session.Save(@case);
     return @case;
 }
 public void MarkCaseAsEmergency(Case @case)
 {
     @case.Status = CaseStatus.Emergency;
     _session.Update(@case);
 }