using System;

using System.Collections.Generic;

​

public class HL7Node

{

    public IDictionary<string, object> Fields {get; set; }

    public List<HL7Node> Children { get; set; }

    public HL7Node() 

    {

        Children = new List<HL7Node>();

    }

}

​

public class Program

{

    public static void Main()

    {

        var root = new HL7Node {

            Fields = new Dictionary<string, object> {

                { "fname", "John" },

                { "lname", "Doe" },

                { "email", "jdoe@example.com" },

            },

        };

        var child = new HL7Node {

            Fields = new Dictionary<string, object> {

                { "fname", "Bob" },

                { "lname", "Doe" },

                { "email", "sdoe@example.com" },

            },

        };

        var grandChild = new HL7Node {

            Fields = new Dictionary<string, object> {

                { "fname", "Sally" },

                { "lname", "Doe" },

                { "email", "sdoe@example.com" },

            },

        };

        var greatGrandChild = new HL7Node {

            Fields = new Dictionary<string, object> {

                { "fname", "Ray" },

                { "lname", "Doe" },

                { "email", "sdoe@example.com" },

            },

        };

        root.Children.Add(child);

        root.Children[0].Children.Add(grandChild);

        root.Children[0].Children[0].Children.Add(greatGrandChild);

        Console.WriteLine(string.Format("Grandchild's name is {0}", root.Children[0].Children[0].Fields["fname"]));

    }

}