title: ERROR CS0117 ('Debug' does not contain a definition for 'log')
body: <p>Im trying to show on console when a gameobject collides with another gameobject with collide. I keep getting this error on unity's console ERROR CS0117, 'Debug' does not contain a definition for 'log'.</p>
  
  <ul>
  <li>im on mac using .net core</li>
  <li>im using vs code 1.35.1
  and unity 2019.3.0a5</li>
  <li>i already have all the usings that i need, but intellisense does not find a definition for my debug or for anything whatsoever, this is frustrating :/</li>
  <li><p>i dont have any other .cs file named debug neither</p>
  
  <pre><code>using UnityEngine;
  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine.SceneManagement;
  
  public class DeadZone : MonoBehaviour
  {
      private void OnCollisionEnter2D(Collision2D collision){
          Debug.log("Collision");
      }
  
      private void OnTriggerEnter2D(Collider2D collision){
          Debug.log("Trigger");
      }
  }
  </code></pre></li>
  </ul>
  
  <p>i expect a "collision" message in the console of unity when my ball gameobject touches a wall gameobject, both with collider but i only get that error within the console, i also already tried using UnityEngine.Debug.log(); but havent got any success yet... :(</p>