ChangeTracker

Program.cs

//https://stackoverflow.com/a/65642075/9218468
using System;
using System.Collections.Generic;
using System.Linq;

namespace ChangeTracker
{
    public class ChangeTracker<T1, T2>
    {
        private readonly IEnumerable<T1> oldValues;
        private readonly IEnumerable<T2> newValues;
        private readonly Func<T1, T2, bool> areEqual;

        public ChangeTracker(IEnumerable<T1> oldValues, IEnumerable<T2> newValues, Func<T1, T2, bool> areEqual)
        {
            this.oldValues = oldValues;
            this.newValues = newValues;
            this.areEqual = areEqual;
        }

        public IEnumerable<T2> AddedItems
        {
            get => newValues.Where(n => oldValues.All(o => !areEqual(o, n)));
        }

        public IEnumerable<T1> RemovedItems
        {
            get => oldValues.Where(n => newValues.All(o => !areEqual(n, o)));
        }

        public IEnumerable<T1> UpdatedItems
        {
            get => oldValues.Where(n => newValues.Any(o => areEqual(n, o)));
        }
    }
    class Program
    {
        static bool AreEqual(string a, string b)
        {
            if (a == null && b == null)
                return true;
            if (a == null || b == null)
                return false;
            return a == b;
        }
        static void Main(string[] args)
        {
            List<string> list = new List<string>();
            list.Add("mustafa");
            list.Add("demozart");
            List<string> list2 = new List<string>();
            list2.Add("demozart");
            list2.Add("oguz");
            var changesTracker = new ChangeTracker<string, string>(list, list2,AreEqual);
            Console.WriteLine("Eklenen");
            Console.WriteLine(String.Join(", ", changesTracker.AddedItems));
            Console.WriteLine("Değişen");
            Console.WriteLine(String.Join(", ", changesTracker.UpdatedItems));
            Console.WriteLine("Silinen");
            Console.WriteLine(String.Join(", ", changesTracker.RemovedItems));
        }
    }
}