Visual Studio 2013 stopped showing variable values when debugging

Question

In a particular project I recently started the debugger started acting funny. When I'm debugging and it is paused at a breakpoint, Data Tips don't show up, some of the variable values don't show up in the Locals and Autos windows, and there are some strangely named variables in the Locals window (the ones starting with "CS". The other ones are my variables):

I can't for the life of me figure out what is different about this project than my other ones. I'm running Visual Studio 2013 in Windows 8.1. The project is a Windows Phone 8 project, with the only added references being Fody, PropertyChanged.Fody, HttpClient et alius, and JSON.net.

Any help would be appreciated.

Answer 1

I had the same problem here (also using windows 8.1 and VS 2013)

To fix it you need to open in VS Tools | Options | Debugger | General and enable the flag [Use Managed Compatibility Mode], which essentially gives you the VS 2012 function evaluation behavior.

Reference: http://weblog.west-wind.com/posts/2013/Nov/21/Visual-Studio-2013-Could-not-evaluate-Expression-Debugger-Abnormality