I have tried following code:
imports system.io
imports system.io.isolatedstorage
private sub Button_Click(sender as system.object, e as system.windows.routedeventargs) handles button1.click
dim isoStore As IsolatedStorageFile = isolatedstoragefile.getuserstoreforapplication
isostore.createfile("c:\test.txt")
end sub
when i run the code on windows phone emulator it shows exception "Operation not permitted on isolatedstoragefilestream"