如何清除connectionstring的configurationmanager缓存

I am trying to change the database name in the connectionstring located in the App.Config of our servicehost at runtime and restart it afterwards connecting to another database. This works fine, but only if the application is shut down for multiple seconds. Shutting down the application for several seconds seems to clear the cache of the ConfigurationManager.Connectionstrings. The problem is that due to this required shutdown time, I can not use Application.Restart() in my application.I am trying to change the database name in the