I have Visual Studio 2013 with no plugins or anything fancy. Whenever I'm coding, every so often (maybe once every half hour) intellisense randomly stops completing my sentences or popping up at all when I press Ctrl+Space.
I have tried Tools->Import and export settings->Reset all settings but it did not help. The issue came right back.
The only thing that solves it for me now is to close VS and reopen it. But as you can imagine, this is extremely frustrating.
For Visual Studio 2017 (and I think Visual Studio 2019 also), close Visual Studio, go into the . vs folder in your projects folder and delete all the contents apart from the . suo file, then reopen Visual Studio. This way you can rebuild the Intellisense cache without losing your preferences.
You can enable or disable particular IntelliSense features in the Options dialog box, under Text Editor > C/C++ > Advanced.
I was having the same problem and this seemed to work for me.
http://omegacoder.com/?p=1008
Basically, go to Tools >> Options >> Text Editor >> All Languages >> General and make sure that both Auto list members
and Parameter information
are checked (not the half-checked/square state).
This is still happening in VS2013 update 4 (I have a WPF project using C#).
This was relatively easy to fix by closing then reopening the file not the whole project.
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