How to select a file from disk and upload to server?

How can I select a file from Windows Phone 7 Device disk (IsolatedStorage or something other) to upload on a remote server?

I need to select a PDF from disk and send it to my server.

thanks.

EDIT 1:

PDF is already on device. I need to get from disk and send to server.开发者_开发知识库

Is there any file enumeration or something equals to get all?

Apps can only access their own IsolatedStorage - they cannot access any other files on the device.

So, unless that PDF was retrieved by your app, and saved to IsolatedStorage via your app, your app cannot access it in order to send it out.