Design Patterns: Reusable Solutions to Recurring Problems
Design Patterns: Reusable Solutions to Recurring Problems A practical guide to classic design patterns in C#/.NET — Factory, Singleton, Repository, Strategy, and Mediator — covering what problem each one actually solves, working implementations, common .NET-specific variations, and honest guidance on when each pattern earns its complexity versus when it's unnecessary ceremony. Table of Contents…
The Factory pattern addresses object creation logic that doesn't belong at the call site. Instead of hardcoding the construction details for each concrete type, the Factory pattern centralizes this logic in a single place. A core interface defines a method for creating instances, while a concrete class implements this interface and decides how to instantiate the appropriate object.
Callers interact with the factory through its interface, without needing to know about the specific concrete types or their construction details. This approach facilitates easier modifications, such as adding new regions or providers, without affecting the existing code that uses the factory.
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