csharp17种Helloworld写法

}
class HelloWorld : HelloWorldBase //继承----不得不严肃起来了，能抽象的已经可以做系统架构设计了！
{
public override void writeHelloWorld()
{
Console.WriteLine("Hello World");
{
[Conditional("DEBUGGING")]
public void writeHelloWorld()
{
Console.WriteLine("Hello World");
}
public static void Main()
{
HelloWorld hw = new HelloWorld();
using System;
public class HelloWorld
{
unsafe public void writeHelloWorld(char[] chrArray)
{
fixed(char *parr = chrArray)
{
public class HelloMessage
{
public string Message
{
get
{
return "Hello, World!!!";
}
}
}
}
//------
using System;
hw.writeHelloWorld();
}
}
14. Using Interfaces //会用接口了
using System;
interface IHelloWorld
{
void writeHelloWorld();
}
public class HelloWorld : IHelloWorld
hw.writeHelloWorld();
}
}
15. Dynamic Hello World //我不会again！补习去again！
using System;
using System.Reflection;
namespace HelloWorldNS
{
public class HelloWorld
d(); //语法的确这么写，但含义无法理解;因为实在体会不出好处来
}
}
13. Using Attributes //我不会！补习去！
#define DEBUGGING
using System;
using System.Diagnostics;
public class HelloWorld : Attribute
using System; （就这？会用命名空间？）
public class HelloWorld
{
public static void Main()
{
Console.WriteLine("HELLO WORLD");
}
}
3. Command Line Arguments
using System;
public class HelloWorld
{
public HelloWorld()
{
Console.WriteLine("HELLO WORLD");
}
public static void Main()
{
HelloWorld hw = new HelloWorld(); //会用类了？构造？
// Instantiating a class dynamically
object[] nctorParams = new object[] {};
object nobj = Activator.CreateInstance(hw,
nctorParams);
}
}
public static void Main()
{
HelloWorld hw = new HelloWorld();
Console.WriteLine(cs.strHelloWorld);
}
}
12. Using Delegates //委托！
using System;
class HelloWorld
{
static void writeHelloWorld() {
Console.WriteLine("HelloWorld");
}
static void Main() {
SimpleDelegate d = new SimpleDelegate(writeHelloWorld); //委托？！？！
// Invoking a method
object[] nmthdParams = new object[] {};
string strHelloWorld = (string) hw.InvokeMember(
"writeHelloWorld", BindingFlags.Default |
{
Console.WriteLine(e.ToString());
}
}
}
10. Creating a DLL and using it in an application //做组件吗？
using System;
namespace HelloLibrary
using System;
public class HelloWorld
{
private static string strHelloWorld;
static HelloWorld() //静态构造
{
strHelloWorld = "Hello World";
{
HelloWorld hw = new HelloWorld();
hw.HelloWorld(); //更进一步的面向对象？会用方法了？
}
}
6. From another class
using System;
public class HelloWorld
{
public void writeHelloWorld()
{
Console.WriteLine("Hello World");
}
public static void Main()
{
HelloWorld hw = new HelloWorld();
using System;
public class HelloWorld
{
public static void Main(string[] args) //会传参数了
{
Console.WriteLine(args[0]);
}
}
4. From Constructor
{
public static void Main()
{
HelloWorldHelperClass hwh = new HelloWorldHelperClass(); //类里调用其它类？
hwh.writeHelloWorld();
}
}
public class HelloWorldHelperClass
hw.writeHelloWorld(); //平常我会觉得很可笑----居然写得这么啰嗦
}
}
9. Exception Handling
using System;
public class HelloWorld
{
public static void Main(string[] args)
}
void writeHelloWorld()
{
Console.WriteLine(strHelloWorld); }
public static void Main()
{
HelloWorld hw = new HelloWorld(); //需要吗？
}
}
}
11. Using Property
using System;
public class HelloWorld
{
public string strHelloWorld
{
get //会用属性了
{
return "Hello World";
BindingFlags.InvokeMethod, null,
nobj, nmthdParams);
Console.WriteLine(strHelloWorld);
}
}
}
16. Unsafe Hello World //平常我也不注意这个！到现在还不是很理解怎么Unsafe!
}
}
class HelloWorldImp
{
static void Main() {
HelloWorldBase hwb = HelloWorld;
HelloWorldBase.writeHelloWorld();
}
}
8. Static Constructor
{