using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
using Microsoft.Win32;

namespace EnvironmentTest
{
    class Program
    {
        static void Main(string[] args)
        {
            IDictionary envir = Environment.GetEnvironmentVariables(EnvironmentVariableTarget.Machine);
            ICollection col = envir.Values;

            foreach (String str in col)
            {
                Console.WriteLine(str);
                Console.Read();
            }

            //RegistryKey regLocalMachine = Registry.LocalMachine;
            //RegistryKey regSYSTEM = regLocalMachine.OpenSubKey("SYSTEM", true);//打开HKEY_LOCAL_MACHINE下的SYSTEM
            //RegistryKey regControlSet001 = regSYSTEM.OpenSubKey("ControlSet001", true);//打开ControlSet001 
            //RegistryKey regControl = regControlSet001.OpenSubKey("Control", true);//打开Control
            //RegistryKey regManager = regControl.OpenSubKey("Session Manager", true);//打开Control
            //RegistryKey regEnvironment = regManager.OpenSubKey("Environment", true);//打开MSSQLServer下的MSSQLServer

            //Console.WriteLine(regEnvironment.GetValue("path").ToString());
            //Console.Read();
        }

    }
}