1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace people
 8 {
 9     public class Class1
10     {
11         //属性
12         private string name;
13         private int age;
14         //构造方法
15         public Class1() {//无参构造 
16         }
17         public Class1(string name, int age) {
18             this.name = name;
19             this.age = age;
20         }
21 
22 
23         //get/set方法
24         public string class1Name {
25             get { 
26                 return name; 
27             }
28             set {
29                 name = value;
30             }
31         }
32 
33         public int class1Age {
34             get {
35                 return age;
36             }
37 
38             set {
39                 age = value;
40             }
41         
42         }
43        //自定义方法
44         public String sayHello() {
45             string rtg;
46             Class1 c=new Class1();
47             c.name = "wuxinwuxin";
48             c.age = 18;
49             rtg = "大家好！我是" + c.age + "的" + c.name;
50             return rtg;
51         }
52 
53 
54     }
55 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Data;
 4 using System.Drawing;
 5 using System.Linq;
 6 using System.Reflection;
 7 using System.Text;
 8 using System.Threading.Tasks;
 9 using System.Windows.Forms;
10 using people;//自定义类库
11 
12  private void button4_Click(object sender, EventArgs e)
13         {
14             Class1 c = new Class1();
15             c.class1Name = "测试";
16             textBox1.Text = c.class1Name ;
17             string rtg = c.sayHello();
18             textBox1.Text += "/*/*/*/*   " + rtg;
19             
20         }