repository แบบ generic ในหน่วยความจำ

using System;
using System.Collections.Generic;
class Repository<T>
{
    private readonly List<T> _items = new();
    public void Add(T item) => _items.Add(item);
    public IReadOnlyList<T> All => _items;
}
class Program
{
    static void Main() { var repo = new Repository<string>(); repo.Add("C#"); Console.WriteLine(repo.All[0]); }
}