C# Set Diffs

SetDiff.cs

using System;
using System.Collections.Generic;

namespace HashSetTest
{
    class Program
    {
        static void Main()
        {
            var curSet = new[] {"A","B","C","D","E"};
            var newSet = new[] {"A","D","E","F","G","H"};

            var added = new HashSet<string>(newSet);
            added.ExceptWith(curSet);

            foreach (var item in added)
                Console.WriteLine("Added: {0}", item);

            var removed = new HashSet<string>(curSet);
            removed.ExceptWith(newSet);

            foreach (var item in removed)
                Console.WriteLine("Removed: {0}", item);

            var unchanged = new HashSet<string>(curSet);
            unchanged.IntersectWith(newSet);

            foreach (var item in unchanged)
                Console.WriteLine("Unchanged: {0}", item);
        }
    }
}