Detect BitLocker programmatically from c# without admin

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Windows displays this in the shell by using the Windows Property System in the Win32 API to check the undocumented shell property System.Volume.BitLockerProtection. Your program will also be able to check this property without elevation.

If the value of this property is 1, 3, or 5, BitLocker is enabled on the drive. Any other value is considered off.

During my search for a solution to this problem, I found references to this shell property in HKEY_CLASSES_ROOT\Drive\shell\manage-bde\AppliesTo. Ultimately, this discovery lead me to this solution.

The Windows Property System is a low-level API, but you can use the wrapper that’s available in the Windows API Code Pack.

Package

Install-Package WindowsAPICodePack

Using

using Microsoft.WindowsAPICodePack.Shell;
using Microsoft.WindowsAPICodePack.Shell.PropertySystem;

Code

IShellProperty prop = ShellObject.FromParsingName("C:").Properties.GetProperty("System.Volume.BitLockerProtection");
int? bitLockerProtectionStatus = (prop as ShellProperty<int?>).Value;

if (bitLockerProtectionStatus.HasValue && (bitLockerProtectionStatus == 1 || bitLockerProtectionStatus == 3 || bitLockerProtectionStatus == 5))
   Console.WriteLine("ON");
else
   Console.WriteLine("OFF");

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