Unity Scripts edited in Visual studio don't provide autocomplete

Question

When I want to edit C# Unity scripts, they open in Visual Studio. It is supposed to provide auto complete for all Unity related code, but it doesn\'t work.

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Answer 1

I hit the same issues today using Visual Studio 2017 15.4.5 with Unity 2017.

I was able to fix the issue by right clicking on the project in Visual Studio and changing the target framework from 3.5 to 4.5.

Hope this helps anyone else in a similar scenario.