Bernhard Hagmann's Blog

Situation

You want to use the ‘dynamic’ type in your unit-test.

Problem

An InvalidOperationException that says ‘Dynamic operations can only be performed in homogenous AppDomain.’ is thrown.

Solution

Changed the attribute ‘enabled’ of the node ‘legacyCasPolicy’ to ‘false’ in the following configuration file:

C:Program Files (x86)Microsoft Visual Studio 10.0Common7IDEPrivateAssembliesMicrosoft.Moles.VsHost.x86.exe.config

Sources

• http://weblogs.asp.net/mjarguello/archive/2011/04/26/using-moles-with-dlr.aspx
• http://www.cameronfletcher.com/post/InvalidOperationException-Dynamic-operations-can-only-be-performed-in-homogenous-AppDomain.aspx
• http://social.msdn.microsoft.com/Forums/en/pex/thread/0a931fc1-9049-482a-bf2d-5499ccf65b82
• http://stackoverflow.com/questions/4230909/odd-exception-in-mvc-3-project