PeachImage
PeachImage.Formats.Gif.GifPassthroughInfo
GifPassthroughInfo.LzwData Property
The frame’s LZW-compressed image data, concatenated from its GIF sub-blocks with the sub-block length-prefix framing already stripped — a continuous LZW bitstream, byte-for-byte as it appears in the file.
public byte[] LzwData { get; init; }