Q:

Resharper Alt Enter not working

Help, I can't function without Resharper.  All of a sudden my Alt+Enter ↵ shortcut (to bring up the action list) has stopped working.  Anybody experienced this or know how to fix? 

A:

Symptom A: the menu pops up for a split second, then goes away.   Fix using the following steps in numerical order. 
Symptom B: pressing Alt+Enter ↵ does nothing.   Fix using Step #2 first then try Step #1 if the issue persists. 

Perform a Visual Studio reset:

Run cmd.exe as Administrator
cd C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\
devenv.exe /ResetSettings

Re-apply Visual Studio keyboard scheme:

(VS2013 latest ReSharper) ReSharper > Options > Environment > Keyboard & Menus > ReSharper Platform keyboard scheme: Visual Studio > Apply Scheme > Save.  This will reset the shortcut keys for ReSharper. 
(older versions) ReSharper > Options > Environment > General > Visual Studio Integration > Apply

A:

You can try going ReSharper -> Options > IntelliSense > General and switching the radio buttons and clicking OK.  Then switching back to the previously selected radiobutton. 
Edit
Here is how to change/assign keyshort cuts in Visual Studio/Resharper from JetBrains Knowledge Base
The command you are looking for is called "ReSharper_QuickFix".  In version 8, this is called "Resharper_AltEnter". 

A:

I had to do this:

Resharper -> Options -> Keyboard & Menus
Select "ReSharper 2.x or IntelliJ IDEA"
Click "Apply Scheme"
Click "Save"

Resharper -> Options -> Keyboard & Menus
Select "Visual Studio"
Click "Apply Scheme"
Click "Save"

