Generic collection class

   
  
using System;
using System.Collections.Generic;

public class Bag<T> {
    private List<T> items = new List<T>();
    public void Add(T item) {
        items.Add(item);
    }
    public T Remove() {
        T item = default(T);
        if (items.Count != 0) {
            Random r = new Random();
            int num = r.Next(0, items.Count);

            item = items[num];
            items.RemoveAt(num);
        }
        return item;
    }
    public T[] RemoveAll() {
        T[] i = items.ToArray();
        items.Clear();
        return i;
    }
}
public class MainClass {
    public static void Main(string[] args) {
        Bag<string> bag = new Bag<string>();

        bag.Add("D");
        bag.Add("B");
        bag.Add("G");
        bag.Add("M");
        bag.Add("N");
        bag.Add("I");

        Console.WriteLine("Item 1 = {0}", bag.Remove());
        Console.WriteLine("Item 2 = {0}", bag.Remove());
        Console.WriteLine("Item 3 = {0}", bag.Remove());
        Console.WriteLine("Item 4 = {0}", bag.Remove());

        string[] s = bag.RemoveAll();
    }
}