define configurations when publishing

There's a custom made application already in production environment for client A. Now my boss decided that he also wants to sell it to client B.

The app relevant s开发者_StackOverflowoftware design guidelines are the following:

• Using clickonce to publish the application (easy to publish updates).
• The database connection sting is isolated on a code file
• All the design styles are defined on App.xaml

Consider the codebase will be the same, which approach should I use to publish the application to different clients?

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If you're able to deploy with click once, this means you have an IIS server running. You could use a WebService for the configuration. How you handle the configuration transfer at that point is entirely up to you (Username/Passworded service, Licensed service, etc.). The WebService allows you to transfer pretty much everything that is serializable, so it should do the work for a configuration.