C# でサムネイルを作成する

// Declare an SVG thumbnail generation function
SVGDocument CreateThumbnail(string imagePath, int width, int height)
{
    // Initialize a new instance of SVGDocument
    var document = new SVGDocument();

    // Create image element with specified size
    var image = (SVGImageElement)document.CreateElementNS("http://www.w3.org/2000/svg", "image");
    image.Href.BaseVal = imagePath;
    image.Width.BaseVal.Value = width;
    image.Height.BaseVal.Value = height;

    // Append the image element to the document
    document.DocumentElement.AppendChild(image);

    return document;
}

// Define thumbnail parameters
string source = "https://docs.aspose.com/html/images/georgia-castle.png";
int thumbnailWidth = 200;
int thumbnailHeight = 200;

// Create an svg thumbnail
using (var svg = CreateThumbnail(source, thumbnailWidth, thumbnailHeight))
{
    // 1) Save thumbnail to an SVG file
    svg.Save("image-thumbnail.svg");

    // 2) Save thumbnail to an image file
    var options = new ImageRenderingOptions
    {
        Format = ImageFormat.Png,
        PageSetup = { Sizing = SizingType.FitContent }
    };
    using (var device = new ImageDevice(options, "image-thumbnail.png"))
    {
        svg.RenderTo(device);
    }
}