I was trying to access a file with the user having only read permission. the code looked like:
FileStream fs =new FileStream( “c:\path\to\file.ext”, FileMode.Open);
and it uset to throw exception “access denied”. After some investigations I’ve found that FileAccess.Read helps a lot. FileStream fs = new FileStream( “c:\path\to\file.ext”, FileMode.Open, FileAccess.Read);