I am still attempting to get some ECS code to actually input into Visual Studio. I am pretty sure I have usings for all the right things and yet still some bits can't be found. I've struggled to find a definitive you must have these packages loaded advice etc. I did wonder if you could add something in Unity hub that allows creation of a blank project already setup with all it needs. i.e. use Hub for more than just version control, use it to create basic skeleton solutions. It would be great to just add a new DOTS project to version xxxx and be able to just follow examples.. For now I am using 2019.1 Exactly what packages should be loaded to utilise DOTS in hybrid mode.