Prevent Isolated storage deletion Silverlight 4 OOB

I have developed one OOB SL4 applicaton for a food chain, and it stores outlet bills locally in isolated storage, and these bills gets uploaded when Internet connection would be available. All is working fine.

But I have seen that if I open silverlight configuration dialogue->isolated storage, can delete the isolated storage 开发者_高级运维of the application. So If there are 1000 bills are pending to upload gets deleted.

Is there any way to prevent the same?, I don;t think so , I know My documents is one more place, but I am looking for alternate way to store data safely?

I tried the Comtoolkit but seems that behaviour is not consistent and not production quality code

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As @NestorArturo states it seems there is no configuration to prevent this.

However, an alternative, for an out of browser application is to use the file system.

File system access. Trusted applications can access System.IO types and related types that are otherwise unavailable to Silverlight. These APIs provide direct read and write access to files in user folders on the local computer. For more information, see How to: Access the Local File System in Trusted Applications.

A third alternative is to write your own COM component; via this technique, you can gain full access to the system.