title: How to set tile in tilemap dynamically?
body: <p>I'm using Isometric Tilemap to make my game map.<br>
  I'm using unity 2018 3.5f version.</p>
  
  <p>But every guide said that just use palette, but my game tilemap is a little 
  dynamic. So I can add, change and delete tiles in tilemap at runtime (dynamically).
  And I must read the tile data from map xml files. So i can add tiles by programmatically.
  In reference there is a 'setTile()' method. But there is no proper example about use this.
  Should I create tile game object first and drag it to prefabs folder for make it tile prefab. And I must use like this? </p>
  
  <pre><code>setTile(position , TilePrefab.Instantiate());
  </code></pre>
  
  <p>May I get some example for how to use setTile to add tiles programatically.
  And I'm a newbie of unity so if you mind please give more tips or advice about tilemap (just anything).</p>