Here is my app setup I have an application "app" which has the app.config. I have added several assemblies to the project that app has a reference to. On a form in "app" I can use system.configuration.configurationmanager.... But I cannot access the same app.config from my other assemblies. I may be going about this wrong I just want to have the dataset included in the assemblies and be able to make them all use the same app.config.