using System;

using System.Linq;

using System.Collections;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        //Generic complex objects

        MyObject oAlpha = new MyObject(1, "A", "Alpha");

        MyObject oBeta = new MyObject(2, "B", "Beta");

        MyObject oGamma = new MyObject(3, "G", "Gamma");

        MyObject oDelta = new MyObject(4, "D", "Delta");

        //Create our first collection

        ArrayList CollectionA = new ArrayList();

        CollectionA.Add(oAlpha);

        CollectionA.Add(oBeta);

        CollectionA.Add(oGamma);

        //Create our second collection

        ArrayList CollectionB = new ArrayList();

        CollectionB.Add(oBeta);

        CollectionB.Add(oGamma);

        CollectionB.Add(oDelta);

        //Get objects in A not in B

        ArrayList DeltaA = new ArrayList();

        foreach (MyObject item in CollectionA)

        {

            if (!CollectionB.Contains(item))

            {

                DeltaA.Add(item);

            }

        }

​

        //Get objects in B not in A

        ArrayList DeltaB = new ArrayList();

        foreach (MyObject item in CollectionB)

        {

            if (!CollectionA.Contains(item))

            {

                DeltaB.Add(item);

            }

        }

​

        foreach (MyObject item in DeltaA)

        {

            Console.WriteLine(item.Description + " is in CollectionA but not in CollectionB");

        }

​

        foreach (MyObject item in DeltaB)

        {

            Console.WriteLine(item.Description + " is in CollectionB but not in CollectionA");

        }

    }

​

    public class MyObject

    {

        public int ID;

        public string Name;

        public string Description;

        public MyObject(int id, string name, string description)

        {

            ID = id;

            Name = name;

            Description = description;

        }

    }

}