I've a plain new .NET 4.5 class library project.
To this project I add the current Unity NuGet package and add the dependency attribute to one property.
Then I got the following compile error:
Error 9 The type 'System.Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
But there is the correct DLL in the Facades directory:
%program files%\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5.2\Facades\System.Runtime.dll
By adding the Reference manually the error disappears.
But for me that smells.
Also the assembly doesn't appear to be in the GAC.
When I build a custom attribute and annotate a class with it, I don't get this error. So it should be related to Unity DIC?
Does someone know what's the reason behind this? And is there a better way to resolve this?
It seems like this is an error when 4.5.2 comes only whith visual studio
reinstalling the .net 4.5.2 sdk helped