How do I create native dll into Unity's installation-directory ( UnityExtensions )

Hello everyone, yeah I have idea - who don't want copy to your asset directory just copy to native unity extensions.

Example for HelloWorld:

create folder to
For Windows:
[ROOT-DIRECTORY]/Editor/Data/UnityExtensions/Unity/HelloWorld

For MacOS:
Unity.app/Contents/UnityExtensions/Unity/HelloWorld

Create folder Editor in created HelloWorld!

Than you write own dll from C# example: EditorWindow with Label.

Is it working?

I am happy now. That is why it works fine because I want own biggest part of Unity. I imagine who is fan of Half-Life / goldsource engine into Unity 3D.

PS: I found nice arguments I really love that.

Thanks for support!