Unknown assembly with random name loaded by WPF application

Question

I have a WPF application and I notice that when I run it there's a line in Visual Studio's output window which says

'SomeApp.exe' (Managed): Loaded 'lwrpft7j'

The name is different every time. It is listed when I call AppDomain.CurrentDomain.GetAssemblies() as well.

What is this random assembly?

Answer 1

Are you using the Xml serializer or acompiled Regex? Some framework classes dynamically generate and compile code and then load the resulting assembly.