This project uses three separate DbContexts, each with its own database and its own migration folder. This guide explains how the setup works and how to work with migrations safely as…
You're building a compiler that needs to perform multiple operations on an abstract syntax tree: type checking, code generation, optimization. Adding each operation as a method to every node class…
You're building a data processing system with multiple report generators. Each report follows the same steps: fetch data, process data, format output, send notification. The steps are the same, but…
You're building a payment processing system that needs to support multiple payment methods: credit card, PayPal, bank transfer. Using if/else statements for each method creates tight coupling and makes adding…
You're building a vending machine. It behaves differently when it has no money, has money, is dispensing, or is out of stock. Using if/else statements for every state creates complex,…
You're building a text editor with undo functionality. Users need to revert to previous document states, but exposing internal state would break encapsulation. The Memento pattern lets you save and…