I get this error when I\'m using FileHelpers.dll, but my IIS is set to Full trust level so it should not be that way
That\'s the full stack trace:
In your IIS 6.0 application pool advanced settings, under "Process Model", set Load User Profile to true.
There are some other things to check like your trust level, but none of them applied to me (it was all full trust already on my dev machine). Setting the application pool to load user profile fixed it.
that help to solve
required permissions cannot be acquired in iis to solve it..