Hi Carlos,
As far as I know, the default VS would share the specific controls for the project type you create by default.
For example, if you create a web project, it would share you all web controls in the Toolbox window.
Of course, please don't enable "Show All" or you add new Items under "choose Items" with custom controls by yourself.

So for the real issue in your side, do you mean that you will get all controls even if your current project doesn't support them, if so, please disable "Show All" option, check it again.
If I have misunderstood this issue, please feel free to let me know.
Best Regards,
Jack
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.