serkan-kilic/erpprogram

This is a Windows Forms inventory and order-management application backed by PostgreSQL. The user workflow starts at the login screen, proceeds to the home navigation and domain forms, and includes customer/item management, stock handling, order entry, and stock reservations. OrderForm explicitly invokes order services and opens the reservation form; the generic business manager validates and delegates CRUD operations to repositories. The excerpts do not show login behavior or most individual managers, so those internal relationships are omitted; form navigation and service wiring use the source index where noted.