XAP FILE

•A .xap file is basically a compiled Silverlight application
•The file is actually a .zip file that contains all the files necessary for the application
•XAP is the file extension for a Silverlight-based application package (.xap). This file contains the compressed assemblies and resources of a Silverlight 2 application.
What is a .xap file?
•A .xap file is a Silverlight-based application package (.xap) that is generated when the Silverlight project is built.
• .XAP file contains the client DLL for the Silverlight application as extra DLLs of assemblies that you are using in your application.
•Just rename the .xap file to have a .zip extension and then you can open it up to see its contents.