Some of the commands on visual studio community are not there?

Hey there!

I have a problem with my visual studio commands and functions. Some of the basic ones are not appearing. I tried to add several libraries, however, it did not help. For example, I tried to use c# codes written for unity. And I don't have basic commands like getObject. 

I uploaded several packages on visual studio community 2019. I don't know what is the problem. 

I need help!

Thank you all!