1 ArrayList arrInt = new ArrayList();
2 //用stopwatch来计时 运行的时间
3 Stopwatch watch = new Stopwatch();
4 watch.Start();
5 for (int i = 0; i < 1000000; i++)
6 {
7 arrInt.Add(i);
8 }
9 watch.Stop();
10 Console.WriteLine(watch.Elapsed);
11 Console.ReadKey();
12
13
14 // 使用泛型集合避免装箱和拆箱。
15 List<int> arrInt1 = new List<int>();
16 Stopwatch watch2 = new Stopwatch();
17 watch2.Start();
18 for (int i = 0; i < 1000000; i++)
19 {
20 arrInt1.Add(i);
21 }
22 watch2.Stop();
23 Console.WriteLine(watch.Elapsed);
24 Console.ReadKey();
