Converting a byte array to PNG/JPG [closed]

You should be able to do something like this:

using System.Drawing.Imaging;
using System.Drawing;
using System.IO;

byte[] bitmap = GetYourImage();

using(Image image = Image.FromStream(new MemoryStream(bitmap)))
{
    image.Save("output.jpg", ImageFormat.Jpeg);  // Or Png
}

Look here for more info.

Hopefully this helps.