Memory consumption of BitmapImage/Image control in Windows Phone 8

I was dealing with the same problem and I think, in the end, that actually I’ve found a workaround, I am not a pro programmer but here is my solution:

  public Task ReleaseSingleImageMemoryTask(MyImage myImage, object control)
    {
        Pivot myPivot = control as Pivot;
        Task t = Task.Factory.StartNew(() =>
        {
            Deployment.Current.Dispatcher.BeginInvoke(() =>
            {
                if (myImage.img.UriSource != null)
                {
                    myImage.img.UriSource = null;
                    DisposeImage(myImage.img);
                }
                PivotItem it = (PivotItem)(myPivot.ItemContainerGenerator.ContainerFromIndex(myImage.number % 10));
                Image img = FindFirstElementInVisualTree<Image>(it);
                if (img != null)
                {
                    img.Source = null;
                    GC.Collect();
                }
            });
            myImage.released = true;
        });
        return t;
    } 


private T FindFirstElementInVisualTree<T>(DependencyObject parentElement) where T : DependencyObject
    {
        var count = VisualTreeHelper.GetChildrenCount(parentElement);
        if (count == 0)
            return null;

        for (int i = 0; i < count; i++)
        {
            var child = VisualTreeHelper.GetChild(parentElement, i);

            if (child != null && child is T)
            {
                return (T)child;
            }
            else
            {
                var result = FindFirstElementInVisualTree<T>(child);
                if (result != null)
                    return result;
            }
        }
        return null;
    }

    private void DisposeImage(BitmapImage img)
    {
        if (img != null)
        {
            try
            {
                using (var ms = new MemoryStream(new byte[] { 0x0 }))
                {
                    img = new BitmapImage();
                    img.SetSource(ms);
                }
            }
            catch (Exception e)
            {
                System.Diagnostics.Debug.WriteLine("ImageDispose FAILED " + e.Message);
            }
        }
    }

Hope this help 🙂