UnauthorizedAccessException when reading from Application Directory

I am trying to read translation files from the application directory, but the call to open a Stream fails:

fstream = new FileStream(path, FileMode.Open);

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I don't quite understand why, as the user persmissions for the file are present.

Does anybody know a way to overcome this?

many thanks in advance,

Philip

EDIT:

I finally found the answer myself. The FileStream accepts another parameter which defnies the file access (FileAccess.Read in this case):

fstream = new FileStream(path, FileMode.Open, FileAccess.Read);

With this modification it works just fine.