Retrieving device information using RtlGetDeviceFamilyInfoEnum.

DeviceFamilyInfoHelper.cs

using System.Runtime.InteropServices;

public static class DeviceFamilyInfoHelper
{
    private static nint pGetDeviceFamilyInfo;
    
    static DeviceFamilyInfoHelper()
    {
        if (!NativeLibrary.TryLoad("ntdll.dll", out var handle)
            || !NativeLibrary.TryGetExport(handle, "RtlGetDeviceFamilyInfoEnum", out pGetDeviceFamilyInfo))
        {
            pGetDeviceFamilyInfo = -1;
        }
    }


    public unsafe static bool GetDeviceFamilyInfo(out UAPInfoVersion uapInfo, out DeviceFamilyInfoEnum deviceFamily, out DeviceFamilyDeviceForm deviceForm)
    {
        uapInfo = default;
        deviceFamily = default;
        deviceForm = default;

        if (pGetDeviceFamilyInfo == -1) return false;

        fixed (void* pUapInfo = &uapInfo)
        fixed (void* pDeviceFamily = &deviceFamily)
        fixed (void* pDeviceForm = &deviceForm)
        {
            ((delegate* unmanaged[Stdcall]<ulong*, uint*, uint*, void>)pGetDeviceFamilyInfo)((ulong*)pUapInfo, (uint*)pDeviceFamily, (uint*)pDeviceForm);
            return true;
        }
    }

    public enum DeviceFamilyInfoEnum : uint
    {
        DEVICEFAMILYINFOENUM_UAP = 0x00,
        DEVICEFAMILYINFOENUM_WINDOWS_8X = 0x01,
        DEVICEFAMILYINFOENUM_WINDOWS_PHONE_8X = 0x02,
        DEVICEFAMILYINFOENUM_DESKTOP = 0x03,
        DEVICEFAMILYINFOENUM_MOBILE = 0x04,
        DEVICEFAMILYINFOENUM_XBOX = 0x05,
        DEVICEFAMILYINFOENUM_TEAM = 0x06,
        DEVICEFAMILYINFOENUM_IOT = 0x07,
        DEVICEFAMILYINFOENUM_IOT_HEADLESS = 0x08,
        DEVICEFAMILYINFOENUM_SERVER = 0x09,
        DEVICEFAMILYINFOENUM_HOLOGRAPHIC = 0x0A,
        DEVICEFAMILYINFOENUM_XBOXSRA = 0x0B,
        DEVICEFAMILYINFOENUM_XBOXERA = 0x0C,
        DEVICEFAMILYINFOENUM_SERVER_NANO = 0x0D,
        DEVICEFAMILYINFOENUM_8828080 = 0x0E,
        DEVICEFAMILYINFOENUM_7067329 = 0x0F,
        DEVICEFAMILYINFOENUM_WINDOWS_CORE = 0x10,
        DEVICEFAMILYINFOENUM_WINDOWS_CORE_HEADLESS = 0x11,
    }

    public enum DeviceFamilyDeviceForm : uint
    {
        DEVICEFAMILYDEVICEFORM_UNKNOWN = 0x00,
        DEVICEFAMILYDEVICEFORM_PHONE = 0x01,
        DEVICEFAMILYDEVICEFORM_TABLET = 0x02,
        DEVICEFAMILYDEVICEFORM_DESKTOP = 0x03,
        DEVICEFAMILYDEVICEFORM_NOTEBOOK = 0x04,
        DEVICEFAMILYDEVICEFORM_CONVERTIBLE = 0x05,
        DEVICEFAMILYDEVICEFORM_DETACHABLE = 0x06,
        DEVICEFAMILYDEVICEFORM_ALLINONE = 0x07,
        DEVICEFAMILYDEVICEFORM_STICKPC = 0x08,
        DEVICEFAMILYDEVICEFORM_PUCK = 0x09,
        DEVICEFAMILYDEVICEFORM_LARGESCREEN = 0x0A,
        DEVICEFAMILYDEVICEFORM_HMD = 0x0B,
        DEVICEFAMILYDEVICEFORM_INDUSTRY_HANDHELD = 0x0C,
        DEVICEFAMILYDEVICEFORM_INDUSTRY_TABLET = 0x0D,
        DEVICEFAMILYDEVICEFORM_BANKING = 0x0E,
        DEVICEFAMILYDEVICEFORM_BUILDING_AUTOMATION = 0x0F,
        DEVICEFAMILYDEVICEFORM_DIGITAL_SIGNAGE = 0x10,
        DEVICEFAMILYDEVICEFORM_GAMING = 0x11,
        DEVICEFAMILYDEVICEFORM_HOME_AUTOMATION = 0x12,
        DEVICEFAMILYDEVICEFORM_INDUSTRIAL_AUTOMATION = 0x13,
        DEVICEFAMILYDEVICEFORM_KIOSK = 0x14,
        DEVICEFAMILYDEVICEFORM_MAKER_BOARD = 0x15,
        DEVICEFAMILYDEVICEFORM_MEDICAL = 0x16,
        DEVICEFAMILYDEVICEFORM_NETWORKING = 0x17,
        DEVICEFAMILYDEVICEFORM_POINT_OF_SERVICE = 0x18,
        DEVICEFAMILYDEVICEFORM_PRINTING = 0x19,
        DEVICEFAMILYDEVICEFORM_THIN_CLIENT = 0x1A,
        DEVICEFAMILYDEVICEFORM_TOY = 0x1B,
        DEVICEFAMILYDEVICEFORM_VENDING = 0x1C,
        DEVICEFAMILYDEVICEFORM_INDUSTRY_OTHER = 0x1D,
        DEVICEFAMILYDEVICEFORM_XBOX_ONE = 0x1E,
        DEVICEFAMILYDEVICEFORM_XBOX_ONE_S = 0x1F,
        DEVICEFAMILYDEVICEFORM_XBOX_ONE_X = 0x20,
        DEVICEFAMILYDEVICEFORM_XBOX_ONE_X_DEVKIT = 0x21,
    }

    [StructLayout(LayoutKind.Explicit, Size = sizeof(ulong))]
    public struct UAPInfoVersion
    {
        [FieldOffset(6)]
        public ushort Major;
        [FieldOffset(4)]
        public ushort Minor;
        [FieldOffset(2)]
        public ushort Build;
        [FieldOffset(0)]
        public ushort Revision;

        public override string ToString()
        {
            return $"{Major}.{Minor}.{Build}.{Revision}";
        }

        public static implicit operator Version(UAPInfoVersion v) => new Version(v.Major, v.Minor, v.Build, v.Revision);
    }
}