C# 获取操作系统版本

string _operatingSystem="";
string _osArchitecture="";
using (ManagementObjectSearcher win32OperatingSystem = new ManagementObjectSearcher("select * from Win32_OperatingSystem"))
{
foreach (ManagementObject obj in win32OperatingSystem.Get())
{
_operatingSystem = obj["Caption"].ToString();
_osArchitecture = obj["OSArchitecture"].ToString();
break;
}
}