static void Main(string[] args)
        {
            //大括号内数字为Ascii码
            int[] helloWorld = { 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100,33};
            for (int i = 0; i<helloWorld.Length; i++)
            {
                Console.Write(Convert.ToChar(helloWorld[i]));
            }
            Console.WriteLine("\n\tby:ら.花舞花落泪");
            Console.ReadKey();
        }

http://app.baidu.com/asciimabiao?keyword=ascii%E7%A0%81%E8%A1%A8

以下是引用心若定水在2012-3-10 17:28:57的发言：

你的源码运行结果是：Hello Worl！
                                   ら.花舞花落泪
改正如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace HelloWorld
{
    class Program
    {
        static void Main(string[] args)
        {
            //大括号内数字为Ascii码
            int[] helloWorld = { 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100,33};                //d的Ascii码是100
            for (int i = 0; i<helloWorld.Length; i++)
            {
                Console.Write(Convert.ToChar(helloWorld));
            }
            Console.WriteLine("\n\tby:ら.花舞花落泪");
            Console.ReadKey();


        }
    }
}