title: "Server block is not well formed" in asp.net page
body: <p>This is a duplicate of an unanswered question.  In VS2013, I have an .aspx page that when I try to open it, it suddenly shows a messagebox with "Some bytes have been replaced with the Unicode substitution character while loading file... with Unicode encoding. Saving the file will not preserve the original file contents".  When I open it with notepad, it consists of non-English characters.  I have no clue where to start looking for the problem.  The web site builds with no errors.  Anyone have any ideas where I can start troubleshooting?  I have made no other recent changes to my local IIS or anything else on my laptop.</p>