System.Collections.ArrayList.GetRange C# (CSharp) Method

        public virtual ArrayList GetRange(int index, int count)
        {
            if (index < 0 || count < 0)
                throw new ArgumentOutOfRangeException(index < 0 ? nameof(index) : nameof(count), SR.ArgumentOutOfRange_NeedNonNegNum);
            if (_size - index < count)
                throw new ArgumentException(SR.Argument_InvalidOffLen);
            Contract.Ensures(Contract.Result<ArrayList>() != null);
            Contract.EndContractBlock();
            return new Range(this, index, count);
        }

        public void Test(int arg)
        {
            ArrayList items = new ArrayList();
            items.Add(1);
            items.AddRange(1, 2, 3);
            items.Clear();
            bool b1 = items.Contains(2);
            items.Insert(0, 1);
            items.InsertRange(1, 0, 5);
            items.RemoveAt(4);
            items.RemoveRange(4, 3);
            items.Remove(1);
            object[] newItems = items.GetRange(5, 2);
            object[] newItems2 = items.GetRange(5, arg);

            List<int> numbers = new List<int>();
            numbers.Add(1);
            numbers.AddRange(1, 2, 3);
            numbers.Clear();
            bool b2 = numbers.Contains(4);
            numbers.Insert(1, 10);
            numbers.InsertRange(2, 10, 3);
            numbers.RemoveAt(4);
            numbers.RemoveRange(4, 2);
            int[] newNumbers = items.GetRange(5, 2);
            int[] newNumbers2 = items.GetRange(5, arg);

            string[] words = new string[5];
            words[0] = "hello";
            words[1] = "world";
            bool b3 = words.Contains("hi");
            string[] newWords = words.GetRange(5, 2);
            string[] newWords2 = words.GetRange(5, arg);
        }