ActiproSoftware.Docking.Wpf30.Aero2.dll missing

Hello,

WPF will probe for operating system theme resources when encountering control libraries.  Aero2 is what is used by Windows 8 and later by default, if it is found.  Old versions of the Docking/MDI product didn't yet define an Aero2 theme, so Windows 8 will throw that exception, however it can be ignored and the app will continue on normally since it gets caught internally by Microsoft's code.

We've never seen an instance of that cause an actual application crash (due to Microsoft catching it) so I wonder if it's something else causing your crash.  If Microsoft's code did crash on that sort of thing, that would prevent any old apps from ever running on newer operating system versions, and that would never be allowed.

I'd recommend you run your app from within VS and set break on all CLR exceptions on.  See where it is having troubles and what is actually crashing it.

As for the Aero2, there's nothing you can do for that annoying exception with the old version other than ignore it.  If you get a newer version of our products, it will go away since we define that theme there.

I figured it out.

I have embedded the Actipro assemblies in the resources and I am using the AssemblyResolve event.

I removed this event handler and then it worked.

The XamlParser asks for the "Aero2.dll" and when searching the main exe assembly there is no name of that sort embedded in the resources.

The search for the name in the assembly was throwing an invalid parameter name or not found exception which I was not catching.

Once I caught it and returned null for the missing Aero2.dll assembly everything worked.