nunit debugs in 64-bit, application is in 32-bit

Question

I'm one of those people who love the Edit and Continue in VS. Because of that I develop apps in 32-bit. But when I run a unit test in debug mode and I try to edit a line, I get the usual "Changes to 64-bit applications are not allowed." message. All my components are marked x86, nunit is installed as a 32-bit application. My system is 64-bit.
How can I force nunit to run as a 32-bit application?

Answer 1

Ok I figured it out. It was indeed the ReSharper TaskRunner that was running as 64-bit, more precisely JetBrains.ReSharper.TaskRunner.CLR4.MSIL.exe. I first created a copy of the file, made it writeable and then forced it's 32BIT flag high:

>corflags JetBrains.ReSharper.TaskRunner.clr4.msil.exe /32bit+ /force

/force because it's signed.

There are several other TaskRunner assemblies but I found this to be the one I'm using (trial and error). Might need to do the same to the others if I run into other ReSharper 64-bit related problems.

Hope this will help others solve the same issue.

Answer 2

For Resharper 5, you can just set the Platform Target, of the assembly you are testing, to x86 (in the IDE's Properties for that project). The new Resharper 5 test runner apparently detects that and runs the tests as 32 bit. No need to mess with corflags.