For Visual Studio 2017 (and other versions) with ReSharper
In Tools | Options | Environmen | Keyboard...
1. Add `CTRL+W` as a Global shortcut for `Window.CloseDocumentWindow`
2. Remove the `CTRL+W` shortcut for `Edit.SelectCurrentWord`
3. Remove the `CTRL+W` shortcut from `ReSharper.ReSharper_ExtendSelection` (it might be assigned twice)
If `CTRL+W` does not work after the steps above, it might be assigned to something else. Check these instructions to troubleshoot that: https://gist.github.com/jpoehls/2030795#gistcomment-2335647
The caveat to this is if you are used to using `CTRL+W` to select the current word. If you do, find another shortcut that works for that.
Massive thanks to https://gist.github.com/jpoehls/2030795 !