private Image ConversaoByteparaImagem(byte[] arraybytes)
    {
        MemoryStream ms = new MemoryStream(arraybytes);
        Image imagem = Image.FromStream(ms);
        return imagem;
    }

Image imagem = Image.FromStream(ms);

using System.Drawing;

using System.Windows.Controls;

using System.IO;
using System.Drawing;

public class Program {
    public static void Main() {
        Image.FromStream(new MemoryStream(new byte[1024]));
    }
}