I’m playing around with XML transformations today and needed a refresher. This is a pretty good explanation straight from the horse’s mouth.
I’m deploying to an Azure website, in which case there are ways to keep connection strings and app settings unique to each slot of your website. https://azure.microsoft.com/en-us/blog/windows-azure-web-sites-how-application-strings-and-connection-strings-work/
However, the setting I need to tweak for production isn’t an “app setting”, but rather a servicemodel client endpoint, which apparently has to be done the hard way. 🙁