App.Config reading

Question

I am trying to read the app.config of a winform exe from within a DLL that is called by the EXE. I am using the code given below, the variable 'config' is picking up the EXE ok, but how do I access the app config settings from here? I want to retrieve the value 'MyValue'. the variable 'configSection' I am using seems to hold nothing of use. Any ideas?