Thanks - yes I did but I wasn't able to successfully do so because I'm getting the exception below when recreating the new one.
"The container has already been initialized either by another call to InitializeContainer or by someone causing the default container to be constructed. Ensure that InitializeContainer is one of the first things that happens in the application host to ensure that it is ready for the first composition."
PS: This happens upon this call (2nd execution of it)
_container = CompositionHost.Initialize( catalog );