A practical guide to building event-driven projections using Entity Framework in .NET. Covers defining projection functions for read models (e.g., shopping cart list and detail views), implementing AddProjection and UpdateProjection generic event handler classes, and wiring everything together via a fluent builder API registered in a DI container. The approach keeps projection logic infrastructure-free and testable, while the fluent registration API connects events, projection functions, and EF DbContext cleanly.
