ToList

public IReadOnlyList<TiffTag> ToList()

using (Metadata metadata = new Metadata(Constants.JpegWithExif))
{
    IExif root = metadata.GetRootPackage() as IExif;
    if (root != null && root.ExifPackage != null)
    {
        const string pattern = "{0} = {1}";

        foreach (TiffTag tag in root.ExifPackage.ToList())
        {
            Console.WriteLine(pattern, tag.TagID, tag.Value);
        }

        foreach (TiffTag tag in root.ExifPackage.ExifIfdPackage.ToList())
        {
            Console.WriteLine(pattern, tag.TagID, tag.Value);
        }

        foreach (TiffTag tag in root.ExifPackage.GpsPackage.ToList())
        {
            Console.WriteLine(pattern, tag.TagID, tag.Value);
        }
    }
}