"The document's current encoding can not correctly save all the characters
within the document. You may want to change to UTF-8 or an encoding that
supports the special characters in this document."
As referenced here, you have some invalid characters in the code...likely caused by something you copied and pasted. If it is from copy'n'pasting, a good solution for this is always to paste the text into Notepad, then re-copy it, thereby eliminating any of those bad characters.