Flatten a Hierarchical Collection of Objects with LINQ

using System;
using System.Collections.Generic;

namespace FlattenExtensionToLINQ.Tests
{
    internal class MyObject
    {
        public MyObject()
        {
            Id = Guid.NewGuid();
        }

        public Guid Id { get; set; }
        public int Value { get; set; }
        public ICollection<MyObject> Children { get; set; }
    }
}