How do we extract "XAP" file in Silverlight?

It's like archive and contains all the resources of silverlight application.
How do we extract xap file?
Step1:
Copy the xap file from clientBin and store in desktop of your machine.
step2:
change the extension in to zip
Example:
test.xap
test.xap.zip
Now you can extract the file.
it's contains one dll and asemblymanifest.info