You need the default AppDynamicsConfig.json file in one of the following .NET Agent probing paths: <appfolder>\<appdll>.AppDynamicsConfig.json, <appfolder>\AppDynamicsConfig.json, or <profilerpath>\AppDynamicsConfig.json to ensure that the agent works. The application dll name should be without a .dll or .exe extension. Having the AppDynamicsConfig.json file placed in an application folder signals to the profiler that it needs to monitor the application. This limitation is put into place to avoid multiple applications from being instrumented on a Windows machine. Currently, we do not have this limitation on Linux.