convert images in a folder to png (support most img formats)

Program.cs

using SixLabors.ImageSharp;
using System.Threading.Tasks;

var imagesPath = @"/path/to/images/";

var images = Directory.GetFiles(imagesPath);
Parallel.ForEach(images, imagePath => {
    using var image = Image.Load(File.OpenRead(imagePath));
    
    image.SaveAsPng(imagePath + ".png");
});