Error CS0012 when building for Hololens

[CMDann]

Overview

I am working on a simple prototype. I have a 3D scan of a part which we have prepared into an FBX and would like to view in augmented reality. Scan is fine and object is added to unity however when I build using the latest release of the toolkit on the latest release of Unity I am met with errors on the Visual Studio side of things.

Unity Scene:

Unity Build Window:

Visual Studio Window:

Error I am receiving:

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0012	The type 'IAsyncAction' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.	Assembly-CSharp	D:\Users\cmdann\Development\Games\TurbineAR\Assets\HoloToolkit\Utilities\Scripts\ApplicationViewManager.cs	62	Active

All error output: https://gist.github.com/CMDann/1c843168953160a6c94e00b831b58fc1

Notes:

• I tried cleaning the solution which resulted in more CS0012 errors
• I am running Visual Studio 2017 Enterprise

Expected Behavior

I would like to deploy the application to the Hololens hardware.

Actual Behavior

Errors (CS0012) in visual studio preventing the application from building.

Steps to reproduce

• Prepare Scene
• Build to visual studio
• Attempt to run on device

Unity Editor Version

• Unity 2017.2.0b11

Mixed Reality Toolkit Release Version

• HoloToolkit-Unity-v1.2017.2.0
• HoloToolkit-Unity-Examples-v1.2017.2.0

[StephenHodgson]

Make sure your Scripting Compatibility level .net 4.6
You may also need to change your scripting runtime version to 4.6 as well.

[CMDann]

Thanks @StephenHodgson I am going to try this right now.

Edit: Unfortunately changing the scripting run time version to 4.6 did not affect it, I had the compatibility level at 4.6 already.

[StephenHodgson]

[StephenHodgson]

If you really need to use the 2017.2 editor then pull the latest master and import a custom package.

[CMDann]

I have 2017.1.2 installed on my machine, I will open the project and try a rebuild.

I have set the SDK target to 10.0.15063

[CMDann]

@StephenHodgson Switching to 2017.1.2 with the target SDK switched to 10.0.15063 removed most of the errors but I am still having a few of the same issues.

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0006	Metadata file 'D:\Users\cmdann\Development\Builds\HoloTest\GeneratedProjects\UWP\Assembly-CSharp\Assembly-CSharp-firstpass.dll' could not be found	Assembly-CSharp	D:\Users\cmdann\Development\Builds\HoloTest\GeneratedProjects\UWP\Assembly-CSharp\CSC	1	Active

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0006	Metadata file 'D:\Users\cmdann\Development\Builds\HoloTest\TurbineAR\Assembly-CSharp-firstpass.dll' could not be found	TurbineAR	D:\Users\cmdann\Development\Builds\HoloTest\TurbineAR\CSC	1	Active

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0006	Metadata file 'D:\Users\cmdann\Development\Builds\HoloTest\GeneratedProjects\UWP\Assembly-CSharp\bin\x86\Release\Assembly-CSharp.dll' could not be found	TurbineAR	D:\Users\cmdann\Development\Builds\HoloTest\TurbineAR\CSC	1	Active

Seems as though it is having a difficult time finding the assembly?

Severity	Code	Description	Project	File	Line	Suppression State
Warning		The referenced component 'Assembly-CSharp-firstpass' could not be found.	TurbineAR			

[StephenHodgson]

Try deleting your build folder and rebuild the player.

[CMDann]

No affect, I do see assembly it is referencing in the project folder.

[StephenHodgson]

Delete the whole UWP folder.

[StephenHodgson]

Uncheck C# projects.

[CMDann]

Removing the UWP fixed an issue (it now sees the assembly). These are the current errors:

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0012	The type 'CoreApplicationView' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.	TurbineAR	D:\Users\cmdann\Development\Builds\HoloTest\TurbineAR\App.cs	34	Active

Which is referencing this line:
m_AppCallbacks.SetCoreApplicationViewEvents(applicationView);

And

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0012	The type 'CoreWindow' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.	TurbineAR	D:\Users\cmdann\Development\Builds\HoloTest\TurbineAR\App.cs	58	Active

Which references:
m_AppCallbacks.SetCoreWindowEvents(coreWindow);

[CMDann]

I tried with C# projects both checked and unchecked which seemed to have no affect.

[StephenHodgson]

What happens when you create a build from the MRTK build window?

Will it build APPX for you?

[CMDann]

Unity said it failed, it did build however same issues when I build from Visual Studio.

[marklinmao]

Is this bug resolved? I am still facing this problem with Unity 2017.3.1f1

[marklinmao]

I followed Hololens100 tutorial and I am blocked with this error:

...
错误 CS0012 类型“CoreApplicationView”在未引用的程序集中定义。必须添加对程序集“Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime”的引用。 HoloPM C:\workspace\unity\HoloPM\App\HoloPM\App.cs 34 活动的
...

[gladys0313]

Hey guys, I had the same problem and now I have figured it out, please take a look here:
https://stackoverflow.com/questions/50314519/cs0012-error-when-building-origami-hololens-101-tutorial/50407748#50407748

[StephenHodgson]

That link 404s

[keveleigh]

@StephenHodgson The link was formatted weirdly. I just edited it.

[wiwei]

Closing issues older than 180 days. If this is still an issue, please reactivate with recent information.