Solved: Visual studio has no auto completion?

What can possibly goes wrong? I install everything along with new 5.4.5 update that include vstool.
I can get VS to work with Unity but it won't have auto completion.

Solved:

Install .Net 3.5 sp1 or just install every .Net version because Unity using old .Net

 

Have you already checked the settings?

I think it's Tools > Options > Text Editor > C#.
There has to be a checkbox for auto-completion.
If it's checked, you should get a list while typing. If one is highlighted, you can use Enter (auto-completes) or Space Bar (auto-completes with a space/blank at the end).

 

also make sure the code actually complies. sometimes if you have typos earlier in a file, code completion will simply not work

For example, missing a semi-colon, closing bracket, or closing parenthesis. A quick way that helps me find where these typos are is (in Monodevelop) select some or all of the code in a file and press alt+up/alt+down which shifts the code up/down and re-formats the selection. the re-format sets each line's indent based on the assumed indent level which quickly points out where those missing characters are (as everything pass the typo will be over indented).

In visual studio the hotkey for formatting code should be (ctrl+e,ctrl+d) for entire document. and (ctrl+e,ctrl+f) to format the current selection

 

Sometimes VS auto complete doesn't work (regardless of Unity), but when I restart it, it works normally, guess sometimes things can go wrong while loading project.

 

I've tried what you said. It doesn't work. I custom install this and Untick everything because it take so long time.

On my other computer. It work fine. Maybe I forgot to install some important module. well let me waste another 2 hour reinstalling Visual Studio and see where will it get me to.

 

Solve:

Install .Net 3.5 sp1 because Unity is asking for it.