How to Recover RAW Files from Sony SD Card?

Questions on SD Card RAW

"All pictures on an SD card in my Sony digital camera are unreadable by showing as RAW files. I cannot copy or delete those RAW pictures either. What can I do to restore those pictures?"

When an SD card shows as RAW file system, you may want to be clear on the following questions:

Sony Photo Recovery - Recover Photos from Sony Digital Camera with Free Program

Can You Restore Photos from Sony Digital Cameras?

I bought a new Sony digital camera and I inserted a SanDisk micro SD card inside the camera. Yesterday when I was taking photos with the camera, I mistakenly press the power off button and switch off the camera. When I turn on the camera again, I could find no data on the memory card. I cannot afford to lose those photos on my camera. Can anybody tell me where are all my files gone? How can I get them back? I will appreciate it very much if somebody can share me the useful solution.