Read original post by Ollie Riches at Awkward Coder
The obvious way to remove the 'Invalid credentials...' message is to actual supply valid credentials, but what about if you want to remove the 'Unable to contact server.Please try again' when using the map control in flight mode.
Matt found a previous post that had done this, not sure how this guy was achieving this as the current build for the map control is sealed and access to the RootLayer property is not allowed...
This didn't stop me :)