How to remove unused using namespaces

Yes you can right click on the page and from the menu select;

Organise Usings > Remove Unused Usings

Alternatively if you prefer shortcuts, please use;

Ctrl + R + G

I am using this all the time, to clean up code, and make code compilation quicker.

Or you can use PowerCommands to remove unused usings for entire projects

In Visual Studio 2017, I use this very simple key combinations: CTRL+R+G to remove unused imports/namespaces

Update:

In VS for Mac:

Unfortunately, there's no default key binding for this but you can always edit your preferences.

Visual Studio -> Preferences

In my case, it is binded as ⌘+R+G

You can install an extension called: Productivity Power Tools 2015 (from Microsoft) and it has an option to automatically remove unused usings when you save your file. No more work needed after.