As a c# coder and emacs user, I've been playing with omnisharp (https://github.com/OmniSharp/omnisharp-emacs). It mostly seems to be working - following the instructions on that page I got company integrated well.
However m-x doesn't find almost all of the helm integrations, omnisharp-helm-find-usages and the like. helm-imenu works, with all the functions from the local file listed.
A brief look at the source shows that the helm integrations are included under this conditional:
(when (require 'helm-grep nil 'noerror)
...using m-x, I can't find helm-grep. I have helm-grep-mode and helm-grep-help, but no individual helm-grep. I can't find a package called that on elpa or melpa either.
I thought maybe I need to require 'helm before omnisharp in my init.el, but the docs linked above don't actually ask me to require 'omnisharp, just to add the hook to csharp-mode.
helm-grep. It is the name ofhelm-grepmodule in Helm. You only havehelm-do-grepcommand. When you install Helm,helm-grepis already installed.(require 'helm-grep nil 'noerror)individually? For me, it returnedhelm-grep.helmbefore Omnisharp. Try(require 'helm-config).helm-configis the default configuration that comes with Helm. It is recommended by Helm maintainer to always load this module, so you don't have to manually load individual Helm components. However, it doesn't includehelm-grep, so you might need to add another line(require 'helm-grep). But based on the code in omnisharp.el, it should be able to get into the body ofwhen. If this doesn't work, maybe you should open a Github issue.