At times we need to see how much memory our system is consuming at any stage. Just add the below line under the code:

Debug.WriteLine(“After loading of pictures ” + (Convert.ToInt32(DeviceExtendedProperties.GetValue(“ApplicationCurrentMemoryUsage”)) / 1024) / 1024 + “MB”);

Say after loading of images in a listbox, add this line and you will see that how much memory all images are taking after loading on wp7 screen.