//引用空間
using System;
//獲取作業系統版本函式
public string GetCurrentOSVersion()
  {
   //Windows作業系統版本號組成部分:主版本號.次版本號.內部版本號.修訂版本號
   string tempOSVersion="";
   //從System引用空間中獲取當前Windows作業系統的詳細描述資訊
   System.OperatingSystem myOperatingSystem =System.Environment.OSVersion;
   //從描述資訊的版本號判斷當前Windows作業系統平臺.
   switch(myOperatingSystem.Platform)
   {
     //操作平臺可能是Windows 95, Windows 98,Windows 98 Second Edition 或者 Windows Me.
    case System.PlatformID.Win32Windows:
    switch (myOperatingSystem.Version.Minor)
    {
     case 0:
      tempOSVersion="Windows 95";
      break;
     case 10:
      if(myOperatingSystem.Version.Revision.ToString()=="2222A")
       tempOSVersion="Windows 98 Second Edition";
      else
       tempOSVersion="Windows 98";
      break;
     case 90:
      tempOSVersion="Windows Me";
      break;
     default:
      tempOSVersion=myOperatingSystem.Version.ToString();
      break;
    }break;
     //操作平臺可能是Windows NT 3.51, Windows NT 4.0, Windows 2000 或者 Windows XP.
    case System.PlatformID.Win32NT:
    switch(myOperatingSystem.Version.Major)
    {
     case 3:
      tempOSVersion="Windows NT 3.51";
      break;
     case 4:
      tempOSVersion="Windows NT 4.0";
      break;
     case 5:
     switch(myOperatingSystem.Version.Minor)
     {
      case 0:tempOSVersion="Windows 2000"; break;
      case 1:tempOSVersion="Windows XP"; break;
      case 2:tempOSVersion="Windows Server 2003";break;
      default:tempOSVersion="Windows Server 2003以上版本"; break;
     } break;
     default:
      tempOSVersion=myOperatingSystem.Version.ToString();
      break;
    }break;

    default:
     tempOSVersion=myOperatingSystem.Version.ToString();
     break;
   }
   return tempOSVersion;
  }