[FIXED] Unity cannot find System.Runtime for stub dlls

Unity Engine
,
1

I’m attempting to build and use a UWP plugin with Unity. I’m creating a stub DLL for Mono. Unity gives me this error as soon as it is brought into the project.

When I build, two more errors appear.

What am I doing wrong with this stub plugin? I’m trying to use 4 versions of this plugin: Mono stub, x86, ARM, and x64. On Unity 5.2.3p3.

2

This is the entire code contained in the dll.

using System;

namespace WinFacePlugin
{
    public static class Face
    {
        public static void Initialize( Action<Action> winThreadRunner, Action<Action> unityThreadRunner ) {
            // Editor stub.
        }

        public static void Login( Action<bool, string> callback ) {
            // Editor stub.
        }
    }
}
3

The error was because I made my stub .dll using a Windows Universal project. targeting .NET 4.6.1.

I changed to making a “Classic Desktop” library project, and set my target framework to “Unity 3.5 .net Subset Base Class Libraries”. There were a few Unity options, not sure which one is the best to pick.

4

Any desktop version of .NET with 3.5 profile should do fine.