make-a-gif.cs

public MemoryStream MergeAsAnimation(IReadOnlyList<MemoryStream> images, ImageParametersBase imageParameters)
{
    var memoryStream = new MemoryStream();

    var encoderOptions = new SkGifEncoderOptions { RepeatCount = 0 };
    using var encoder = new SkGifEncoder(memoryStream, encoderOptions);

    foreach (var imageStream in images)
    {
        imageStream.Position = 0;
        using var image = SKImage.FromEncodedData(imageStream);

        var frameInfo = new SkGifEncoderFrameInfo
        {
            Duration = 500,
            TransparentColor = SKColor.Empty
        };

        encoder.AddFrame(image, frameInfo);
    }
    
    memoryStream.Position = 0;

    return memoryStream;
}