关键字params 求解惑

悬赏园豆：10 [待解决问题]

如题。

直接上代码

 1 class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             write(1, 2, 3);
 6             Console.WriteLine("-----------------");
 7             write("1", "2", "3");
 8             Console.WriteLine("==============================");
 9 
10             int[] iArr = new int[] { 1, 2, 3 };
11             List<int> ilist = new List<int>() { 1, 2, 3 };
12             write(iArr);
13             Console.WriteLine("-----------------");
14             write(ilist);
15             Console.WriteLine("==============================");
16 
17             string[] strArr = new string[] { "1", "2", "3" };
18             List<string> strlist = new List<string>() { "1", "2", "3" };
19             write(strArr);
20             Console.WriteLine("-----------------");
21             write(strlist);
22             Console.WriteLine("==============================");
23 
24             st[] stArr = new st[] { new st(), new st() };
25             List<st> stList = new List<st> { new st(), new st() };
26             write(stArr);
27             Console.WriteLine("-----------------");
28             write(stList);
29             Console.WriteLine("==============================");
30 
31             DateTime[] dtArr = new DateTime[] { new DateTime(), new DateTime() };
32             List<DateTime> dtlist = new List<DateTime>() { new DateTime(), new DateTime() };
33             write(dtArr);
34             Console.WriteLine("-----------------");
35             write(dtlist);
36             Console.WriteLine("==============================");
37 
38             List<cls> clsList = new List<cls> { new cls(), new cls() };
39             cls[] clsArr = new cls[] { new cls(), new cls() };
40             //object[] objs = (object[])clses;
41             write(clsArr);
42             Console.WriteLine("-----------------");
43             write(clsList);
44             //write(objs);
45         }
46         static void write(params object[] arr)
47         {
48             Console.WriteLine(arr.Length);
49             //foreach (object o in arr)
50             //{
51             //    Console.WriteLine(o.GetType());
52             //}
53         }
54         //static void write(object[] arr)
55         //{
56         //    Console.WriteLine(arr.Length);
57         //}
58     }
59     public class cls
60     {
61 
62     }
63     public struct st
64     {
65 
66     }