PostSharp

[alansingfield]

Hello,

I have a WinForms project, with a separate control library, both of which reference a common DLL with an OnExceptionAspect handler.

The windows form contains a user control from the control library. Once I try to open the form in the Designer, this error is shown on the Designer surface:

Unable to cast object of type 'TestAspect1Library.TraceAttribute' to type 'TestAspect1Library.TraceAttribute'.

at ~PostSharp~Laos~Implementation..cctor()

If I remove the PostSharp processing (on both the Form and the UserControl) and recompile, it works correctly.

[alansingfield]

Example project at:
[url=http://www.didsburysoftware.co.uk/TestAspect1.zip]http://www.didsburysoftware.co.uk/TestAspect1.zip[/url]

[gfraiteur]

Generally, the error "Unable to cast object of type X to type X." means that two versions of the same assembly have been loaded in the application domain.

Does this help?

[alansingfield]

That would figure; as I have both a WinForms EXE and separate UserControl DLL both referencing the same project. I'll try using a strong name and let you know if that helps.