Use WIC component with GDI+ (version 3)

ReadHeicFileThroughGdiPlusAndWic.cs

    var hr = GdiplusStartup(out var token, StartupInputEx.GetDefault(), out var output);
    using var img = new Bitmap(Environment.GetCommandLineArgs()[1]);

    [DllImport("gdiplus")]
    private static extern int GdiplusStartup(out nint token, in StartupInputEx input, out StartupOutput output);

    private struct StartupInputEx
    {
        public int GdiplusVersion;
        public nint DebugEventCallback;
        public bool SuppressBackgroundThread;
        public bool SuppressExternalCodecs;
        public int StartupParameters;

        public static StartupInputEx GetDefault()
        {
            var result = new StartupInputEx
            {
                GdiplusVersion = 3
            };
            return result;
        }
    }