小白，一个关于c# helloworld里面的一些问题，具体情况如下所示！

Question

namespace point{class Program{public class greetings{public static void EnglishGreeting(){Console.WriteLine("Hello World!");}public static void SpanishGreeting(){Console.WriteLine("Ciao,mondo!");}public static void ItaliamGreeting(){Console.WriteLine("Hola,imundo!");}delegate void greetingdele();class hello{static void Main(string[] args){int iChoice = int.Parse (args[0]);greetingdele[] deletest ={new greetingdele (greetings.ItaliamGreeting),new greetingdele (greetings .EnglishGreeting),new greetingdele (greetings .SpanishGreeting)};deletest[iChoice -1]();}}}}}问题1：int.Parse(args[0])这句是什么意思？问题2：deletest[iChoice-1]（）是怎么一一访问到委托数组的元素的？问题3：Main方法里的参数 string[] args 有什么用？

Answer 1

greetingdele[] deletest =
{
new greetingdele (greetings.ItaliamGreeting),
new greetingdele (greetings .EnglishGreeting),
new greetingdele (greetings .SpanishGreeting)
};
可能要改成
greetingdele[] deletest =new greetingdele[]
{
new greetingdele (greetings.ItaliamGreeting),
new greetingdele (greetings .EnglishGreeting),
new greetingdele (greetings .SpanishGreeting)
};