I have just inherited an MVC 5 application to work on. I am trying to step through code to see the state of various objects that are involved in a given request to an action method. However, no information is available. I.e., if I type the ? in the immediate window, it says "could not evaluate expression". Also, when I hover over any variable, I get no tool tip with values as I normally would. Is there a setting in VS that would be causing this? I've never experienced this. thanks
Try checking the following option in Visual Studio:
Tools - Options - Debugging - General - Use Managed Compatibility Mode
For reference see here.