public void Add(Family subFamily)
{
if (SubFamilies.Any(f => f.AllMembers.Intersect(subFamily.AllMembers).Count() != 0))
{
throw new InvalidOperationException($"A member of the sub-family to be added is already a direct member of the family or a member of an existing sub-family.");
}
this.SubFamilies.Add(subFamily);
}
public void Add(Person person)
{
if (SubFamilies.Any(f => f.AllMembers.Contains(person)))
{
throw new InvalidOperationException($"{person} is already a member of a sub-family of this family and cannot be added again.");
}
this.DirectMembers.Add(person);
person.DirectFamily = this;
}