title: Add System.Drawing.Common reference
body: <p>I started to move one of my projects from .NET Framework to .NET Core (3.1) and I got a compiler error.</p>
  
  <p>I have a class working with Bitmap but it can't be found in <code>System.Drawing</code>. VS was so kind to tell me that it was moved to <code>System.Drawing.Common</code> which is in system.drawing.common.dll.</p>
  
  <p>Well... I can't add it as a reference bc I can't find it anywhere.<br>
  Where can I add the <code>System.Drawing.Common</code> namespace to my project?</p>