The type 'ValueType' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard'

I have 1 project. Studio works on 1 computer with the new version. On another, it doesn’t work. Why? What

Main.xaml: The type ‘ValueType’ is defined in an assembly that is not referenced. You must add a reference to assembly ‘netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51’.

Hi, you have problem with dependency:

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Download / Update the package in the project.

Nooo :slight_smile:

it’s not this fault. it would be too beautiful;)

And by the way, this package doesn’t work either. And the update doesn’t fix the problem. please do not pay attention to it. As I wrote on 1 computer, it works. and not on others

Have you read this?:

Maybe you will find a clue.

Thanks for the hint.
I have seen. I tried to add in the project.json file.
But I had mistakes. How should I add it correctly?
If I copy a project from 1 computer to another computer, are the references also copied?

Can I add a missing reference with Manage Packages?

Did you copy the entire project or just the workflow from the project?
If you copy the whole project 1: 1 everything moves (only not all packages may be installed from the manager to the local folder: C:\Users\ UserName.nuget\packages.
Or maybe you haven’t added a namespace to the IMPORTS tab?

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ExcelUtility is a separate problem. It does not work on 1 PC or 2 PCs

The project was copied 1: 1 (but different Studio versions) which should have no effect.

The problem is: dict1.FirstOrDefault (x => x.Value == ‘AQUINOV’). Key

What generates this error:

The type ‘ValueType’ is defined in an assembly that is not referenced. You must add a reference to assembly ‘netstandard, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = cc7b13ffcd2ddd51’.

This problem is very important to me because I cannot solve it. How? and what exactly reference should I add to make Lambda expression work? dict1.FirstOrDefault (x => x.Value == ‘AQUINOV’). Key

The lambda expression worked in the older Studio, but it did not work in the newer studio?

That’s how it goes :).
Copies 1: 1 project and does not work on the older version. And in the newer the project comes from. But that is clearly the library’s fault, not the Studio’s. When I try to compile I get the error:
The type ‘ValueType’ is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = cc7b13ffcd2ddd51 ’…

As you can see, I am trying to get the Key based on the value from the dictionary using lambda.
There is no reference. But I have no idea why or what. And how do I add to make it work.