C# 创建Dll文件供程序调用方法

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace TestDll
 8 {
 9     public class Test
10     {
11         private int a;
12         private int b;
13 
14         public Test(int a,int b )
15         {
16             this.a = a;
17             this.b = b;
18         }
19 
20         public int add()
21         {
22             return a + b;
23         }
24 
25         public int add(int x,int y)
26         {
27             return x + y;
28         }
29 
30      }
31 }

1 using TestDll;
2  
3 //实例化对象
4 Test test = new Test(3, 5);
5  
6 //调用方法
7 MessageBox.Show(test.add().ToString());
8 MessageBox.Show(test.add(5,5).ToString());