Putting this here to give me a chance of remembering next time I do this – because I will.
I was trying to recompile my custom workflow library and I got the error “Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.” Eventually I remembered that I’d recently installed a new FIM service pack – once I unpacked the new versions of Microsoft.IdentityManagement.WebUI.Controls.dll and Microsoft.IdentityManagement.WFExtensionInterfaces.dll the solution compiled just fine.
