ListWrapper.cs

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using System;
using System.Collections.Generic;
 
namespace java.util
{
 
    class ListWrapper<T> : CollectionWrapper<T>, IList<T>
    {
 
        readonly List _list;
 
        public ListWrapper(List list) :
            base(list)
        {
            _list = list ?? throw new ArgumentNullException(nameof(list));
        }
 
        public T this[int index] 
        {
            get => (T)_list.get(index);
            set => _list.set(index, value);
        }
 
        public int IndexOf(T item) => _list.indexOf(item);
 
        public void Insert(int index, T item) => _list.add(index, item);
 
        public void RemoveAt(int index) => _list.remove(index);
 
    }
 
}