Windows Forms

Trigger On

• working on Windows Forms UI, event-driven workflows, or classic LOB applications
• migrating WinForms from .NET Framework to modern .NET
• cleaning up oversized form code or designer coupling
• implementing data binding, validation, or control customization

Workflow

1. Respect designer boundaries — never edit .Designer.cs directly; changes are lost on regeneration.
2. Separate business logic from forms — use MVP (Model-View-Presenter) pattern. Forms orchestrate UI; presenters contain logic; services handle data access.

   // View interface — forms implement this
   public interface ICustomerView
   {
       string CustomerName { get; set; }
       event EventHandler SaveRequested;