title: Why Unity Visual Studio doesn't recognise "Using MlAgents" when I create a new project, but recognises it within the demo project?
body: <p>I've been trying to get Unity's MLAgents installed on my system.
  After going through the detailed guide "<a href="https://github.com/Unity-Technologies/ml-agents/blob/master/docs/Installation-Windows.md" rel="nofollow noreferrer">https://github.com/Unity-Technologies/ml-agents/blob/master/docs/Installation-Windows.md</a>" I managed to get the demo projects like the "3D Ball" to work and train successfully.</p>
  
  <p>My problem is that when I create a new project I get an error highlighted when I include "Using MlAgents" which states "The type of namespace name 'mlagents' could not be found".</p>
  
  <p>I don't have much experience with Unity, so I'm expecting this to be a silly thing I've missed, for instance you might have to import the package, but I have no clue how?</p>
  
  <p>All the tutorials I've found are really outdated so this is my last resort. Any help or advice is appreciated.</p>
  
  <p>I don't understand how the demo project has no errors with "Using mlagents" but new projects do.</p>