1 namespace ConsoleApplication1
 2 {
 3     class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             string name = "卡卡西";
 8             string address="火影村";
 9                 string mail="kakaxi@qq.com";
10                 decimal wage = 3000m;
11             Console.WriteLine("我叫"+name+",我来自"+address+"，我的邮箱是"+mail+"，我每个月的工资是"+wage+"。");
12             Console.ReadKey();
13 
14 
15 
16         }
17     }
18 }

 1 namespace ConsoleApplication1
 2 {
 3     class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             string name = "卡卡西";
 8             string address="火影村";
 9                 string mail="kakaxi@qq.com";
10                 decimal wage = 3000m;
11             Console.WriteLine("我叫{0}，我来自{1}，我的邮箱是{2}，我每个月工资是{3}。",name,address,mail,wage);
12             Console.ReadKey();
13 
14 
15 
16         }
17     }
18 }

 1 namespace ConsoleApplication1
 2 {
 3     class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7 
 8             int a = 80;
 9             int b = 10;
10 
11             a = a - b;
12             b = b + a;
13             a = b - a;
14             Console.WriteLine("交换后，a={0}，b={1}", a, b);
15             Console.ReadKey();
16 
17 
18         }
19     }
20 }

 1 namespace ConsoleApplication2
 2 {
 3     class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             int n1 = 10;
 8             int n2 = 20;
 9             int temp = n1;//建立一个第三方变量，使它等于n1;
10 
11             n1 = n2;//将n2赋值给n1;
12             n2 = temp;//第三方等于n1的值重新赋值给n2;
13             Console.WriteLine("n1={0},n2={1}.",n1,n2);
14             Console.ReadKey();
15             
16 
17         }
18     }
19 }

 1 namespace ConsoleApplication3
 2 {
 3     class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             Console.WriteLine("你今年多少岁啦？");
 8             string age = Console.ReadLine();
 9 
10 
11             Console.WriteLine("恭喜你，你今年已经{0}岁啦！", age);
12             Console.ReadKey();
13         }
14     }
15 }