How to use System.Drawing in Unity2018

Questions & Answers
1

version: 2018.3.0f2
Api Compatibility Level : .Net Standard 2.0

I need to use System.Drawing in Unity, so i copy “\Unity\Editor\Data\Mono\lib\mono\2.0\System.Drawing” to “Assets\Plugins”. I get an error :

"Microsoft (R) Visual C# Compiler version 2.9.1.65535 (9d34608e)
Copyright (C) Microsoft Corporation. All rights reserved.

error CS1703: Multiple assemblies with equivalent identity have been imported: ‘D:\ActProject runk\Assets\Plugins\System.Drawing.dll’ and ‘C:\Program Files\Unity\Editor\Data\NetStandard\compat\2.0.0\shims
etfx\System.Drawing.dll’. Remove one of the duplicate references.

2

Solve it by switching API version to ".NET 4.x.

Specific steps:

  1. Click Edit > Project Settings…
  2. Goto “Player” Panel
  3. Find Configuration > Api Compatibility Level*
  4. Select “.NET 4.x”

(Unity version: 2019.2.17f1)