Resharper Alt Enter not working

In addition to the answers above, there is an easy way Using Resharper 3.3

in Visual Studio 2017

• Open Tools > Options or press Alt + T + O
• Under Environment tab > Keyboard
• Search for "AltEnter" and select Resharper_AltEnter
• Add a new shortcut Alt+Enter
• Assign > OK

and it worked...

I've also found that Kwex solution works but sometimes it doesn't put all of the shortcuts back.

I found this strange solution

http://youtrack.jetbrains.com/issue/RSRP-287309

i found an ad-hoc solution which seems to do the trick for now (not sure if this is universal, but it worked here. Twice):

1. I exported my current settings which had the not working ReSharper shortcuts set (Tools-Import/Export->Export selected...)
2. I imported the settings again (Tools->Import/Export->Import selected...)

Kind of a hack perhaps, but the keyboard shortcuts seem to work.

solution helped fix the rest (especially Control + B - go to definition)

Solved by installing "IntelliJ keyboard shortcut extension". Didn't find any of the Reshaper options.

One other solution to this:

This can be caused by ReSharper extensions that are no longer compatible with the installed version of ReSharper. Uninstalling the extensions typically fixes it for me.

I have typically seen this when using the EAP versions of R#. For example, as of this writing, the current EAP R# 2021.3 has several plugins that are incompatible and cause exceptions on load that cause light bulb actions / alt+enter to fail to load: https://youtrack.jetbrains.com/issue/RSRP-486452

Note: You may see error messages pop up when Visual Studio starts up that will be caused by said incompatible exceptions.