Since a month ago, my VS doesn't seem to want to display the summary info for any system methods or classes.
I had ReSharper installed and started noticing this problem. I assumed ReSharper disabled the default method descriptions, so wasn't thinking much about, only considering it a mere annoyance.
After removing ReSharper, though, the problem persisted.
VS now only shows descriptions for my own methods which I've added a
This looks more like a framework issue rather that a VS/R# issue. If neither one of them can load the description strings, it probably means the description XML files are missing.
Check if you see the XML files in:
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\4.5.2
If you don't, then reinstall the framework to fix the issue.
.NET Framework 4.5.2 Developer Pack: https://www.microsoft.com/en-us/download/details.aspx?id=42637