AppDomain.CurrentDomain.RelativeSearchPath is null in Unit Test

Question

I have email templates (and emailer) in separate class library project. I am getting path to views (copy to ouput directory = true) like this:

var basePath = AppDomain.CurrentDomain.RelativeSearchPath;
var path = Path.Combine(basePath, "Views", viewname + ".cshtml");

When I try to run this code in unit test project basePath is null.But it shouldn't be null!!

Who can explain me -

1. why basepath is null?
2. how to fix it?

Answer 1

As per MSDN:

Private assemblies are deployed in the same directory structure as the application. If the path specified by the RelativeSearchPath property is not under AppDomainSetup.ApplicationBase, it is ignored.

This property returns the value set using AppDomainSetup.PrivateBinPath.

You should set AppDomainSetup.PrivateBinPath first.