Unit test project cannot find assembly under test (or dependencies)

Question

When I try to run my Unit Test project, I get the following error:

Could not load file or assembly \'ASSEMBLY_NAME, Version=1.0.0.0, Culture=neutral, Pub

Answer 1

I tried all above to no avail. Finally, in the csproj i changed

<Private>False</Private>

to

<Private>True</Private>

on the references and all tests passed.

Answer 2

Maybe enabling assembly loading logging can give you a hint about why your assembly cannot be loaded.

http://msdn.microsoft.com/en-us/library/e74a18c4.aspx

Answer 3

I had the same issue and found that copying the dll's to the GAC resolved the issue. Though I still don't understand why it doesn't use the referenced projects assemblies.

Answer 4

Check Build->Configuration Manager... menu. All projects should have the same platform and column Build checked.

Also you can take a look into output of the build (Output window), it usually states more clearly which file could not be found.