Change DB connection string after publishing c # console application

• I have a development environment connection string in the App.config file of my C # console application.
• I need to change the connection string after publishing the application.
• Whenever I publish, a manifest file is created that has some hash keys in it, and if I try to change the configuration files, it throws an error message it has a different computed hash than specified in manifest.

How to get around this problem