com port

Question

why this code doesn't show any result??

 

ManagementObjectCollection mReturn;
ManagementObjectSearcher mSearch;
mSearch = new ManagementObjectSearcher("Select * from Win32_SerialPort");
mReturn = mSearch.Get();

foreach (ManagementObject mObj in mReturn)
{
Console.WriteLine(mObj["Name"].ToString());
}

 

please help.