title: Type or namespace name 'Description' could not be found
body: <p>Im currently working on a MR application for UWP. I'm building the application in unity3d (tested in 5.5.2 and 2017.1.2) and everything works fine when i press play within unity, no compile errors what so ever... But when I go to build the application i get errors <code>Assets\Script\DMEWebRequest.cs(35,10): error CS0246: The type or namespace name 'DescriptionAttribute' could not be found (are you missing a using directive or an assembly reference?)</code> and <code>Assets\Script\DMEWebRequest.cs(35,10): error CS0246: The type or namespace name 'Description' could not be found (are you missing a using directive or an assembly reference?)</code></p>
  
  <p>To my knowledge the DescriptionAttribute is a part of <code>System.ComponentModel</code></p>
  
  <p>Code snippets from my C# script</p>
  
  <pre><code>using System.Collections;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System;
  using UnityEngine;
  using UnityEngine.Networking;
  using UnityEngine.UI;
  
  
  //Makes a dropdown menu in the inspector
  public enum EGU {
      [Description("")] None,
      [Description("ºC")] DegreesCelcius,
      [Description("kW")] KiloWatts,
      [Description("kW/h")] KiloWattsPerHour,
      [Description("MW")] MegaWatts,
      [Description("MW/h")] MegaWattsPerHour,
      [Description("M³")] CubicMeters,
      [Description("M³/h")] CubicMetersPerHour,
      [Description("%")] Procentage,
      [Description("º")] Degrees,
      [Description("l/s")] LiterPerSecond,
      [Description("cm")] CentiMeters,
      [Description("m")] Meters,
      [Description("mg/l")] MiliGramPerLiter,
      [Description("g/l")] GramPerLiter
      }
  </code></pre>
  
  <p>Hope someone can help me figure out what directive or reference I'm missing.</p>
  
  <p>/T</p>