C#里面如何创建很多同类型的数组

我是像下面一样弄得，如何简化呀大佬们，嘤嘤嘤
//ArrayList alist2 = new ArrayList();
//ArrayList alist3 = new ArrayList();
//ArrayList alist4 = new ArrayList();
//ArrayList alist5 = new ArrayList();
//ArrayList alist6 = new ArrayList();
//ArrayList alist7 = new ArrayList();
//ArrayList alist8 = new ArrayList();
//ArrayList alist9 = new ArrayList();
//ArrayList alist10 = new ArrayList();

ArrayList[] lists = new ArrayList[10];
for (int i = 0; i < 10; i++)
lists[i] = new ArrayList();