Get the letter of CD drive in Unity

So, Ive been trying to get the letter of my CD drive from within a Unity script, since I want to open my drive ingame. Sadly, the obivous DriveInfo solutions do not work. I tried offloading the logic from monobehaviour into a ScriptableObject, but that doesnt work either.

My logic is this:

 System.IO.DriveInfo[] drives = System.IO.DriveInfo.GetDrives();
 string driveLetter;

 public string cdDrive()
 {
     foreach (System.IO.DriveInfo drive in drives)
     {
         if (drive.DriveType == System.IO.DriveType.CDRom) { driveLetter = drive.Name; }
     }
     return driveLetter;
 }

and

  void Start () {

     CDdrive Instance = ScriptableObject.CreateInstance<CDdrive>();
     string cdDrive = Instance.cdDrive();
     print(cdDrive);
 }

which gives me exceptions like this:

NotImplementedException: The requested feature is not implemented. System.IO.DriveInfo.WindowsGetDrives () (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/DriveInfo.cs:221) System.IO.DriveInfo.GetDrives () (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/DriveInfo.cs:232) CDdrive..ctor () (at Assets/CDdrive.cs:9) UnityEngine.ScriptableObject:CreateInstance() cddrivegetletter:Start() (at Assets/cddrivegetletter.cs:11)

Is there any way to relyably get the exact letter of a CDdrive in Unity (Personal), or is there any way to circumvent this issue? I really do not want to start sending the entire alphabet to the OS for the offchance to open a tray with standard naming conventions