The first line of the file is an import statement, with no character in front of the word "import".
I assume that the question mark is there because the character \65279 cannot be displayed correctly.
But I have no idea how that character got there, or how to get rid of it.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com