Question

I’m using FileIOPermission, and it’s throwing an error on me:

FileIOPermission fileIOPerm = new FileIOPermission(FileIOPermissionAccess.AllAccess, folderName);
string[] paths = fileIOPerm.GetPathList(FileIOPermissionAccess.AllAccess);`

Error is:

ArgumentException was unhandled – Must set exactly one flag.

I Googled this, there’s no info anywhere for this error.

Answer 1

From the MSDN documentation

Append , Read, Write, and
PathDiscovery access to a file or
directory. AllAccess represents
multiple FileIOPermissionAccess values
and causes an ArgumentException when
used as the access parameter for the
GetPathList method, which expects a
single value.