C# Hello World的写法有哪些

这篇文章主要介绍"C# Hello World的写法有哪些"，在日常操作中，相信很多人在C# Hello World的写法有哪些问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"C# Hello World的写法有哪些"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

C# Hello World写法入门:

1. 初学者

public class HelloWorld   {   public static void Main()   {   System.Console.WriteLine("HELLO WORLD");   }   }

2. 改进的HELLO WORLD

using System;   public class HelloWorld   {   public static void Main()   {   Console.WriteLine("HELLO WORLD");   }   }

3. 命令行形式

using System;   public class HelloWorld   {   public static void Main(string[] args)   {   Console.WriteLine(args[0]);   }   }

4. 构造函数

using System;   public class HelloWorld   {   public HelloWorld()   {   Console.WriteLine("HELLO WORLD");   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   }   }

C# Hello World写法进阶:

5. 面向对象

using System;   public class HelloWorld   {   public void helloWorld()   {   Console.WriteLine("HELLO WORLD");   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   hw.HelloWorld();   }   }

6. 从其他类

using System;   public class HelloWorld   {   public static void Main()   {   HelloWorldHelperClass hwh = new HelloWorldHelperClass();   hwh.writeHelloWorld();   }   }   public class HelloWorldHelperClass   {   public void writeHelloWorld()   {   Console.WriteLine("Hello World");   }   }

7. 继承

abstract class HelloWorldBase   {   public abstract void writeHelloWorld();   }   class HelloWorld : HelloWorldBase   {   public override void writeHelloWorld()   {   Console.WriteLine("Hello World");   }   }   class HelloWorldImp   {   static void Main() {   HelloWorldBase hwb = HelloWorld;   HelloWorldBase.writeHelloWorld();   }   }

8. 静态构造函数

using System;   public class HelloWorld   {   private static string strHelloWorld;   static HelloWorld()   {   strHelloWorld = "Hello World";   }   void writeHelloWorld()   {   Console.WriteLine(strHelloWorld);   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   hw.writeHelloWorld();   }   }

9. 异常处理

using System;   public class HelloWorld   {   public static void Main(string[] args)   {   try   {   Console.WriteLine(args[0]);   }   catch(IndexOutOfRangeException e)   {   Console.WriteLine(e.ToString());   }   }   }

10. 名字空间

using System;   namespace HelloLibrary   {   public class HelloMessage   {   public string Message   {   get   {   return "Hello, World!!!";   }   }   }   }   ------   using System;   using HelloLibrary;   namespace HelloApplication   {   class HelloApp   {   public static void Main(string[] args)   {   HelloMessage m = new HelloMessage();   }   }   }

11. 属性

using System;   public class HelloWorld   {   public string strHelloWorld   {   get   {   return "Hello World";   }   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   Console.WriteLine(cs.strHelloWorld);   }   }

12. 代理

using System;   class HelloWorld   {   static void writeHelloWorld() {   Console.WriteLine("HelloWorld");   }   static void Main() {   SimpleDelegate d = new SimpleDelegate(writeHelloWorld);   d();   }   }

13. 使用属性

#define DEBUGGING   using System;   using System.Diagnostics;   public class HelloWorld : Attribute   {   [Conditional("DEBUGGING")]   public void writeHelloWorld()   {   Console.WriteLine("Hello World");   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   hw.writeHelloWorld();   }   }

14. 接口

using System;   interface IHelloWorld   {   void writeHelloWorld();   }   public class HelloWorld : IHelloWorld   {   public void writeHelloWorld()   {   Console.WriteLine("Hello World");   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   hw.writeHelloWorld();   }   }

C# Hello World的特别写法:

15. 动态Hello World

using System;   using System.Reflection;   namespace HelloWorldNS{   public class HelloWorld   {   public string writeHelloWorld()   {   return "HelloWorld";   }   public static void Main(string[] args)   {   Type hw = Type.GetType(args[0]);   // Instantiating a class dynamically   object[] nctorParams = new object[] {};   object nobj = Activator.CreateInstance(hw, nctorParams);//, nctorParams);   // Invoking a method   object[] nmthdParams = new object[] {};   string strHelloWorld = (string) hw.InvokeMember("writeHelloWorld", BindingFlags.Default | BindingFlags.InvokeMethod, null, nobj, nmthdParams);   Console.WriteLine(strHelloWorld);   }   }

16. 不安全代码Hello World

using System;   public class HelloWorld   {   unsafe public void writeHelloWorld(char[] chrArray)   {   fixed(char *parr = chrArray)   {   char *pch = parr;   for(int i=0; i< chrArray.Length; i++)   Console.Write(*(pch+i));   }   }   public static void Main()   {   HelloWorld hw = new HelloWorld();   char[] chrHelloWorld = new char[] {'H','e','l','l','o', ' ', 'W','o','r','l','d'};   hw.writeHelloWorld(chrHelloWorld);   }   }

17. 使用InteropServices

using System;   using System.Runtime.InteropServices;   class Class1   {   [DllImport("kernel32")]   private static extern int Beep(int dwFreq, int dwDuration);   static void Main(string[] args)   {   Console.WriteLine("Hello World");   Beep(1000, 2000);   }   }

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