MafiaTelegramBot/MafiaTelegramBot/CustomCollections/Extensions/ListExtension.cs

using System.Collections.Generic;

namespace MafiaTelegramBot.CustomCollections.Extensions
{
    public static class ListExtension
    {
        public static T GetAndRemove<T>(this List<T> list, int index)
        {
            var value = list[index];
            list.RemoveAt(index);
            return value;
        }

        public static void AddTimes<T>(this List<T> list, T item, int times)
        {
            for (var i = 0; i < times; ++i) list.Add(item);
        }

        public static List<T> Copy<T>(this List<T> list)
        {
            return new(list);
        }

        public static bool AddUnique<T>(this List<T> list, T item)
        {
            if (list.Contains(item)) return false;
            list.Add(item);
            return true;
        }
    }
}