Analyzing Swift Protocol Extensions and C# Abstract Classes

This article analyzes the similarities and differences between Swift protocol extensions and C# abstract classes, written from the perspective of a developer experienced in both languages. It explains how Swift lacks abstract classes but uses protocol extensions for abstraction, while C# offers both interfaces and abstract classes. The author discusses how protocol extensions provide default implementations similar to abstract classes, yet differ in inheritance and composability. The article compares their use cases, strengths, and weaknesses, ultimately offering insights into which approach the author prefers for modeling abstractions in software development.