ImageToBitmapSourceConverter.cs

using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media.Imaging;

namespace LazyStarter
{
    [ValueConversion(typeof(Image), typeof(BitmapSource))]
    public class ImageToBitmapSourceConverter : IValueConverter
    {
        [DllImport("gdi32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool DeleteObject(IntPtr value);

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value == null)
                return null;

            var bitmap = new Bitmap((Image)value);
            IntPtr bmpPt = bitmap.GetHbitmap();
            BitmapSource bitmapSource =
             System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                   bmpPt,
                   IntPtr.Zero,
                   Int32Rect.Empty,
                   BitmapSizeOptions.FromEmptyOptions());

            //freeze bitmapSource and clear memory to avoid memory leaks
            bitmapSource.Freeze();
            DeleteObject(bmpPt);

            return bitmapSource;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}