using System.Collections;

namespace System.Windows.Forms
{
    public class ObjectCollectionBase : WrappedCollection
    {
        protected internal IList items;

        protected override IList InnerList => items;

        public object this[int index]
        {
            get => items[index];
            set => items[index] = value;
        }

        public int Add(object obj) => items.Add(obj);

        public void AddRange(object[] objects)
        {
            foreach (object obj in objects)
                Add(obj);
        }

        public void Insert(int index, object obj) => items.Insert(index, obj);

        public void Remove(object obj) => items.Remove(obj);

        public void RemoveAt(int index) => items.RemoveAt(index);

        public void Clear() => items.Clear();

        public int IndexOf(object obj) => items.IndexOf(obj);

        public bool Contains(object obj) => items.Contains(obj);

        internal ObjectCollectionBase(IList items)
        {
            this.items = items;
        }
    }
}