Error while building project hololens - Error: CS0006 "...\Assembly-CSharp-firstpass.dll" can not found

Questions & Answers
1

I’m building a simple project for Hololens.

Unique scene with a simple Cube.

I follow this tutorials for make it:

→ HoloLens (1st gen) Basics 100 - Getting started with Unity - Mixed Reality | Microsoft Learn
→ Using Visual Studio to deploy and debug - Mixed Reality | Microsoft Learn
→ Getting Started with Hololens and Unity3D – Vangos Pterneas

But this erros is display when I build:

100876-error.png
100876-error.png991×474 49.3 KB

I’m using the lastest version of Unity and Visual Studio:

Unity: v2017.1.0f3

Visual Studio: v15.3.2

The interesting thing is I’ve a friend with v15.2 release(26430.16) Visual Studio and he is build any Hololens application normally.

I already re-install my Visual Studio and Unity (for lastest version) but the erros continues.

I found this tutorial → HoloLens fix – Visual Studio 2017 build error – The Imaginative Universal but not works.

My output:

Restoring NuGet packages ...
To prevent NuGet from restoring packages during compilation, open the Visual Studio Options dialog box, click on the Package Manager node and uncheck 'Allow NuGet to download missing packages during compilation'.
1> ------ Compilation started: Project: Assembly-CSharp-firstpass, Configuration: x86 Release ------
1> Running SerializationWeaver ...
1> System.Collections.Generic.KeyNotFoundException: The supplied key was not present in the dictionary.
1> at System.ThrowHelper.ThrowKeyNotFoundException ()
1> at System.Collections.Generic.Dictionary`2.get_Item (TKey key)
1> in UnityEditor.Scripting.Compilers.NuGetPackageResolver.Resolve ()
1> in Unity.NuGetAssemblyResolver..ctor (String projectLockFile)
1> in usw.Weaver.ReaderParameters (String assemblyPath, ConversionOptions options)
1> in usw.Weaver.Weave ()
1> in usw.Program.RunProgram (ConversionOptions options)
1> in usw.Program.Main (String [] args)
C: \ Users \ luq.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ GeneratedProjects \ UWP \ Assembly-CSharp-firstpass \ Assembly-CSharp-firstpass.csproj (196,5): error MSB3073: : \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ Unity \ Tools \ SerializationWeaver \ SerializationWeaver.exe "" C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ GeneratedProjects \ UWP \ Assembly- CSharp-firstpass \ bin \ x86 \ Release \ Unprocessed \ Assembly-CSharp-firstpass.dll "-pdb" -verbose "-web-engine = C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ BuildLimpa \ Unprocessed \ UnityEngine.dll "" C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ app \ GeneratedProjects \ UWP \ Assembly-CSharp-FirstPass \ obj \ x86 \ Release \ x86 \ Release "" -lock = C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ app \ GeneratedProjects \ UWP \ Assembly-CSharp-FirstPass \ project.lock.json "" @C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ GeneratedProjects \ UWP \ Assembly-CSharp-firstpass \ SerializationWeaverArgs.txt "-additionalAssemblyP ATH = C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ app \ BuildLimpa \ Unprocessed "" -unity-networking = C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ app \ BuildLimpa \ Unprocessed \ UnityEngine.Networking.dll "was terminated with code 1.
2> ------ Compilation started: Project: Assembly-CSharp, Configuration: Release x86 ------
2> CSC: error CS0006: C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ GeneratedProjects \ UWP \ Assembly-CSharp-firstpass \ bin \ x86 \ Release-Assembly-CSharp-firstpass source file. Dll "can not be found
3> ------ Compilation started: Project: BuildLimpa, Configuration: Release x86 ------
3> CSC: error CS0006: C: \ Users \ luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ GeneratedProjects \ UWP \ Assembly-CSharp-firstpass \ bin \ x86 \ Release-Assembly-CSharp-firstpass source file. Dll "can not be found
CSC: Error CS0006: C: \ Users \ Luiz.santana \ Documents \ _Unity3D \ BuildLimpa \ App \ GeneratedProjects \ UWP \ Assembly-CSharp \ bin \ x86 \ Release \ Assembly-CSharp.dll "source file can not To be found
========== Compile: 0 successfully, 3 failed, 0 refreshed, 0 ignored ==========
========== Deployment: 0 Successfully, 0 Failed, 0 Ignored ==========

What must be happening? How I can solve it?

2

I was getting the same error with Unity 2017.1.0f3 and VS 2017 v15.3.3 on my first simple project.

Then I installed the latest Unity beta 2017.2.0b9 but I did something slightly different which may have solved the actual problem.
When Unity installs I remember asking to select the scripting module, I picked .NET and when I built the Unity project, I selected the same backend to match .NET. (By default I think is IL2CPP).

To configure that I picked in Unity:
File > Build Settings (with Universal Windows Platform selected) Target Device: HoloLens

Player Settings button
in the Inspector window, under Other Settings section
in the Configuration section select the Scripting Backend drop down and pick .NET

Then back in the Build Settings window, click on the Build button.
I loaded the generated solution in VS 2017 and worked perfectly.
Hope this will help.