FrameCollection<TFrame> Class

public sealed class FrameCollection<TFrame> : FrameCollectionBase

using (var reader = new TiffReader(@"Images\in.tif"))
{
    for (int i = 0; i < reader.Frames.Count; i++)
    {
        using (var bitmap = reader.Frames[i].GetBitmap())
        {
            bitmap.Save(@"Images\Output\frame_" + i.ToString() + ".jpg");
        }
    }
}