1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace ConsoleApplication1
 7 {
 8     class Program
 9     {
10         static void Main(string[] args)
11         {
12             PersonBLL p = new PersonBLL();
13             PersonController pc = new PersonController(p); //初始化带参构造函数
14             //输出：初始化了带参构造函数
15             Console.WriteLine("---------------------------------");
16             PersonController pc1 = new PersonController();//初始化无参构造函数
17             //输出：初始化了带参构造函数
18             //      初始化了无参构造函数
19         }
20     }
21 
22     public class PersonController
23     {
24         private PersonBLL personBLL;
25 
26         public PersonController(PersonBLL p)
27         {
28             this.personBLL = p;
29             Console.WriteLine("初始化了带参构造函数");
30         }
31 
32         public PersonController()
33             : this(new PersonBLL())
34         {
35             Console.WriteLine("初始化了无参构造函数");
36         }
37     }
38 
39     public class PersonBLL
40     {
41     }
42 }