using System;
using System.Collections;

class ForeachApp
{
    public static void Main()
    {
        // 把環(huán)境變量中所有的值取出來，放到變量environment中
        IDictionary environment = Environment.GetEnvironmentVariables();
        
        // 打印表頭
        Console.WriteLine("環(huán)境變量名\t=\t環(huán)境變量值");

        // 遍歷environment中所有鍵值
        foreach (string environmentKey in environment.Keys)
        {
            // 打印出所有環(huán)境變量的名稱和值
            Console.WriteLine("{0}\t=\t{1}", environmentKey, environment[environmentKey].ToString());
        }
    }
}