public TheInheritor(TheArgument theArgument) : base(theArgument == null ? -1 : theArgument.TheId)
{
if (theArgument == null)
{
throw new ArgumentNullException("theArgument");
}
}
public TheInheritor(TheArgument theArgument, Func <TheArgument, int> idSelector)
: base(idSelector(theArgument))
{