OBJ_INHERIT and related attributes are int whereas OBJECT_ATTRIBUTES.Attributes is uint

[ChrisDenton]

In the metadata Windows.Wdk.Foundation.OBJECT_ATTRIBUTES is defined as:

public struct OBJECT_ATTRIBUTES
{
	public uint Length;
	public HANDLE RootDirectory;
	[Const]
	public unsafe UNICODE_STRING* ObjectName;

	public uint Attributes;

	[Const]
	public unsafe void* SecurityDescriptor;
	[Const]
	public unsafe void* SecurityQualityOfService;
}

Note that the Attributes field is uint. However, the attributes that can be set are defined as int:

// Windows.Win32.System.Kernel.Apis
public static class Apis
{
	public const int OBJ_INHERIT = 2;
	public const int OBJ_PERMANENT = 16;
	public const int OBJ_EXCLUSIVE = 32;
	public const int OBJ_CASE_INSENSITIVE = 64;
	public const int OBJ_OPENIF = 128;
	public const int OBJ_OPENLINK = 256;
	public const int OBJ_KERNEL_HANDLE = 512;
	public const int OBJ_FORCE_ACCESS_CHECK = 1024;
	public const int OBJ_IGNORE_IMPERSONATED_DEVICEMAP = 2048;
	public const int OBJ_DONT_REPARSE = 4096;
	public const int OBJ_VALID_ATTRIBUTES = 8178;
}