A notifyicon is used to notify users at the bottom right corner of Windows screen. In order to create Notification application should use namespace System.Windows.Forms and we get NotifyIcon instance.
Generally, we are getting the application path using Application.StartupPath. It will return the path of the executable file that started the application.
When I tried to run the application I got the following error it was resolved. You need to use the result of the query as datasource for your combobox.