using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var object1 = new Thing

        {

            Value = 1,

            SomeString = "hello world",

            Reference = new [] { 5, 10, 15 }

        };

        //save off references

        var savedString = object1.SomeString;

        var savedRef = object1.Reference;

        Console.WriteLine($"SomeString hash: {object1.SomeString.GetHashCode()}  -- savedString hash: {savedString.GetHashCode()}");

        Console.WriteLine($"Reference hash: {object1.Reference.GetHashCode()}  -- savedRef hash: {savedRef.GetHashCode()}");

        Console.WriteLine("------------");

        //kill reference on object

        object1.SomeString = "blah blah blah";

        object1.Reference = new List<int>();

        //is the original "Reference" changed?

        Console.WriteLine($"SomeString hash: {object1.SomeString.GetHashCode()}  -- savedString hash: {savedString.GetHashCode()}");

        Console.WriteLine($"Reference hash: {object1.Reference.GetHashCode()}  -- savedRef hash: {savedRef.GetHashCode()}");

        Console.WriteLine("------------");

        Console.WriteLine($"{object1.SomeString} ~~~ {savedString}");

        Console.WriteLine($"{object1.Reference.Count()} ~~~ {savedRef.Count()}");

    }

    public class Thing

    {

        public int Value { get; set; }

        public string SomeString { get; set; }

        public IEnumerable<int> Reference { get; set; }

    }

}