If I could make the connection string a "User" setting for them to edit, that would do nicely for now. At the moment the string contains a reference to my machine, where my test DB sits. I want to build an alpha for somebody else to try, but they’ll need to point it to their own DB instance.
More generally, what is the correct approach to keep DataSets in the Visual Studio designer whilst having a connection string capable of being pointed to the configured server by the user? – at the moment they seem dependant on the Connection String in my Settings.
Use app.config with System.Configuration, they can then set the correct connection string in the config.
See this question for how:
Get connection string from App.config