using System;

​

var nokiaPhone = new Phone { Model = "Nokia 6610" };

​

var kim = new Employee {

    FirstName = "Victorya",

    LastName = "Kim",

    PersonalPhone = new() { Model = "iPhone 5" }

}; 

​

Console.WriteLine(nokiaPhone.Model);

Console.WriteLine(kim.PersonalPhone.Model);

​

class Phone {

    public string Model { get; set; }

}

​

class Employee {

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public Phone PersonalPhone { get; set; }

}