namespace TestConsole
{
    using System;
    using System.Collections;
    using System.Collections.Generic;
    using System.Linq;

    public class Collection
    {
        private Dictionary<string, IList> _dict;

        public Collection()
        {
            _dict = new Dictionary<string, IList>();
        }

        public void Add<T>(string key, T item)
            where T : IKek
        {
            var list = GetList<T>(key);
            list.Add(item);
        }

        public List<T> GetList<T>(string key)
            where T : IKek
        {
            if (_dict.TryGetValue(key, out var list) && (list is List<T> concrecList))
            {
                return concrecList;
            }

            var newList = new List<T>();
            _dict.Add(key, newList);
            return newList;
        }

        public IEnumerator<T> GetEnumerator<T>(string key)
            where T : IKek
        {
            return GetList<T>(key).GetEnumerator();
        }
    }

    public interface IKek
    {
        public string Text { get; set; }

        public string Code { get; set; }
    }
}