Microsoft Fakes MSB3270: There was a mismatch between the processor architecture

Question

Hi,
I´m using Microsoft fakes in my test project and it shows this annoying message:
warning MSB3270: There was a mismatch between the processor architecture of
the project being built "MSIL" and the processor architecture of the reference
"ThirdPartyDll, Version=xxx, Culture=neutral, processorArchitectu
re=x86", "x86". This mismatch may cause runtime failures. Please consider chang
ing the targeted processor architecture of your project through the Configurati
on Manager so as to align the processor architectures between your project and
references, or take a dependency on references with a processor architecture th
at matches the targeted processor architecture of your project.
The fake has been created from a Project which references Microsoft.VisualStudio.Coverage.Analysis which has been compiled in x64 (I´ve had problems too with this assembly becuase I´m using it in a custom activity for a build definition, you can see
this post regarding that
http://social.msdn.microsoft.com/Forums/en-US/tfsprocess/thread/d4896ad3-aba1-4c36-8570-dcc55c41df95/).
I can use the following tag to hide the warnings during the project compilation but it doesn´t work for fakes:
<PropertyGroup>
<ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
</PropertyGroup>
https://connect.microsoft.com/VisualStudio/feedback/details/728995/new-vs2010-project-compiler-warning-since-installing-dotnet4-5-vs2011-beta
So, any ideas about how to solve this?
Regards

Answer 1

Hi Chirstian,
Although the link is quite old I´m working with the update 1 of VS2012.
You can reproduce the warning very easily.
1. - Create a new class library project.
2. - Add a reference to Microsoft.VisualStudio.Coverage.Analysis.dll (not the one located in Program Files x86\Microsoft Visual Studio 11.0\Common7\IDE\PrivateAssemblies) from your Build Server (located in your build machine -> Program Files\Microsoft
Team Foundation Server 11.0\Application Tier\TFSJobAgent\plugins. I ´ve put this assembly in my Versión Control path to custom assemblies).
3. - Compile the project. You´ll get the warning MSB3270 for the class library. You can solve this warning creating the following property group for the library project:
<propertyGroup>
<ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
None
</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
</propertyGroup>
With this tag, the warning will disappear.
4. - Create a new Test Project. Add a reference to the same Coverage assembly as you did previously and you´ll get the same warning. Put the tag to solve it.
5. - In the test Project, add a reference to the class library project created previously. After that, add fakes assembly for this assembly. Right now, if you compile the Project you should get the warning.
Microsoft.QualityTools.Testing.Fakes.targets (62,5) : Warning MSB3270: There was a mismatch between the processor architecture...
I´m afraid I can´t send you a sample project. You can ask me whatever you want if you need help to reproduce it though.
Regards.