C#: Convert an Image to a BitmapImage

using System.Windows.Media.Imaging;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

//...

public BitmapImage Convert(Image img)
{
    using (var memory = new MemoryStream())
    {
        img.Save(memory, ImageFormat.Png);
        memory.Position = 0;

        var bitmapImage = new BitmapImage();
        bitmapImage.BeginInit();
        bitmapImage.StreamSource = memory;
        bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
        bitmapImage.EndInit();

        return bitmapImage;
    }
}