Unity autocompletion is missing

Hello everyones !
I am trying to write c# scripts but I can't use the autocompletion on both visual studio and Monodevelopp for the unity functions.
For exemple when I write "get" on both IDE they suggest "GetType" and "GetHashCode" even when there are the "UnityEngine" and "System.Collections" using. They dont recognize "GameObject" ...
I have tried many things to solve the problem like delete all the .csproj and .sln in the root directory, use Monodevelopp instead, reinstall Unity, create another project ...

 

There could be error in the script or other scripts, it sometimes stops auto-completion..?
Or assign script editor again manually from the Preferences / external editor (helps for monodev usually)

 

Thanks for your response !
There is just a camera, a light and a script in the project with an empty Start and Update. I tryed this it doesn't work either.

 

Which version you have? Did you install all the needed modules on the installer?

 

I have Unity 5.3.3f1, I haven't installed unity and visual studio at the same time. I have visual studio Community 2015 (14.0.24720.00 Update 1) and the .Net framework 4.5 / 4.5.1/ ... / 4.6.1.

 

There was something I missed, if you don't install unity and vs at the same time you will have to install the vs tools for unity. You can found it here. I hope it helps somebody one day !