public override int GetHashCode()
 {
     unchecked
     {
         int hashcode = WorkPosition.GetHashCode() +
                        WorkExperience.GetHashCode() +
                        BirthDay.GetHashCode() +
                        FirstName.GetHashCode() +
                        MiddleName.GetHashCode() +
                        LastName.GetHashCode();
         return(hashcode);
     }
 }