static的使用

 1 class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5 
 6             GreetPeople("Mingle",Language.English);
 7             GreetPeople("明高",Language.Chinese);
 8             Console.ReadLine();
 9         }
10 
11         public static void GreetPeople(string name,Language lang)
12         {
13             switch (lang) { 
14                 case Language.English:
15                     EnglishGreeting(name);
16                     break;
17                 case Language.Chinese:
18                     ChineseGreeting(name);
19                     break;
20             }        
21         }
22 
23         public enum Language { 
24             English,Chinese
25         }
26 
27         public static void EnglishGreeting(string name)
28         {
29             Console.WriteLine("Morning," + name);
30         }
31 
32         public static void ChineseGreeting(string name)
33         {
34             Console.WriteLine("早上好，" + name);
35         }
36     }

如果在方法EnglishGreeting前不使用static，在调用的时候将报错:Error 1 An object reference is required for the non-static field, method, or property 'ConsoleApplication4.Program.EnglishGreeting(string)'