using System;

using System.Collections.Generic;

​

public class HelloWorld

{

    public class Person

    {

        public string Name { get; set; }

        public List<Person> Children { get; set; }

    }

    public static void Main(string[] args)

    {

        var people = new List<Person> {

            new Person {

                Name = "Pap",

                Children = new List<Person> {

                    new Person {

                        Name = "Dad",

                        Children = new List<Person> {

                            new Person {

                                Name = "Nicole"

                            },

                            new Person {

                                Name = "Troy"

                            },

                            new Person {

                                Name = "Victoria"

                            }

                        }

                    }

                }

            }

        };

        ProcessPeople(people);

    }

    static void ProcessPeople(List<Person> people, string parentName = null) {

        for (var i = 0; i < people.Count; i++) {

            var person = people[i];

            if (parentName != null) {

                if (person.Children != null) {

                    Console.WriteLine(person.Name + " has a parent of " + parentName + " with children:");

                }

                else {

                    Console.WriteLine(person.Name + " has a parent of " + parentName + " with No children.");

                }

            }    

            else {

                if (person.Children != null) {

                    Console.WriteLine(person.Name + " has no parent with children:");

                }

                else {

                    Console.WriteLine(person.Name + " has no parent and No children.");

                }

            }

            if (person.Children != null) {

                ProcessPeople(person.Children, person.Name);

            }

        }

    }

}