<PackageReference Include="System.Drawing.Common" Version="10.0.4" />

Windows.Win32.System.Com.IUnknown

struct IUnknown : IComIID
namespace Windows.Win32.System.Com { internal struct IUnknown : IComIID { public unsafe HRESULT QueryInterface(Guid* riid, void** ppvObject); public uint AddRef(); public uint Release(); } }