"The imported type `System.Threading.SpinLock' is defined multiple times" error

Unity Engine
,
1

Hi

I getting this error after adding the ECS package to a project in Unity 2018.1f1:

Has anyone a solution for this problem?

Greetings

Tuni

2

I am getting the same. I reported as bug to Unity. We will see what happens.
Unity Version: 2018.1.0f2
C:/Users/paul/AppData/Local/Unity/cache/packages/packages.unity.com/com.unity.entities@0.0.12-preview.2/Unity.Entities/Types/TypeManager.cs(64,36): error CS0433: The type ‘SpinLock’ exists in both ‘System.Threading, Version=1.0.2856.102, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ and ‘mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’

https://fogbugz.unity3d.com/default.asp?1039710_2l88n52t9mn9ftem