Child

using System;

class Child : Person
{
    public Child(string name, int age)
        : base(name, age)
    {
        Age = age;
    }

    public override int Age
    {
        get
        {
            return base.Age;
        }
        set
        {
            if (Age >= 15)
            {
                throw new ArgumentException("Child's age must be less than 15!");
            }

            Age = value;
        }
    }
}