Getting error CS0246 in a unit test, but I'm certain I've included the correct references

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RodAtWork asked Apr 8, '20 CaleSweeney-8946 answered Nov 10, '21

Getting error CS0246 in a unit test, but I'm certain I've included the correct references

I have a Shared Project, which at the moment is a part of a bare bones WPF project. It builds and runs fine. Next I'm trying to add a unit test (MSTest) project to the solution, to test the Shared Project. I've made a reference to the shared project. The shared project has some methods which are used for doing conversion of hex string values to Color data type, that is used in WPF. I've included references to both the WindowsBase and System.Windows assemblies in the unit test project. However, when I try to build the solution now, it fails with the following error:

Error CS0246 The type or namespace name 'Color' could not be found (are you missing a using directive or an assembly reference?) EmptyWPF.Tests D:\Src\CoreShared\CoreShared\Common\ColorHelper.cs 10 Active

I really thought I'd included all references that are needed for building the solution, even with a unit test that references the shared project. I'm not sure why I'm getting this error.

I'm using VS 2019.

windows-wpf

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JorneS · Apr 09, 2020 at 08:16 AM

Did you clean the solution and rebuild it?

Does the reference shows correctly in Visual Studio Editor?

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RodAtWork JorneS · Apr 09, 2020 at 05:14 PM

I hadn't cleaned and rebuilt the solution. Just did that. It didn't get rid of the error.

I think it's showing the unit test project correctly in the Visual Studio Editor. Here's a screen shot of the unit test project:

The reference to CoreShared is the shared project.

FWIW, I just added a reference to the EmptyWPF project, which also references CoreShared. It didn't prevent the CS0246 errors complaining about the Color object. So, I'm removing EmptyWPF.

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unit-test-in-solution-explorer.jpg (40.1 KiB)

Answer 1 · 2020-04-09T17:26:00.35Z

RodAtWork answered Apr 9, '20

Never mind, I found the problem. I hadn't included the PresentationCore assembly.

My bad.

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Answer 2 · 2021-11-10T20:46:42.617Z

CaleSweeney-8946 answered Nov 10, '21

For me and my separate xunit test, I had this problem. Stranger still everything was building and running fine.

In visual studio 2019, right click on the unit test project in the solution explorer.
Add > References
Uncheck the main projects that your unit test project references.
Click OK.
Go back in, re-add those projects.
Click OK.

You should be all set.

I think somehow the configuration settings for project references get corrupted somehow.

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