Don't worry. Not everyone knows it...

Images play a very significant role in any Windows Phone application. So, one should be very careful while dealing with images. As of now, Windows Phone supports only two image formats named JPG/JPEG and PNG. Now before concluding on which image format to choose, let's get into bit more depth of it. PNG format images are non-lossy and need very little CPU effort to display because those are pixel perfect. But at the same time, huge PNG images take too much longer to read from storage and ultimately lead to slower display. On the other hand, JPEG format images are lossy, smaller to store  and based on the compression level much more complicated decoding algorithm is required to display them. Another point regarding image is about opacity and transparency -  All the images that use transparency should be stored as PNG format because JPEG doesn’t support transparency and JPEG format should be used for all the images that are fully opaque. Now when coming to Windo...