When it comes to software development, Low-Level Design (LLD) is the step where high-level architectural ideas are converted into detailed, implementable designs. It’s where abstract concepts meet the reality of coding, helping developers build systems that are maintainable, efficient, and scalable. In this blog, we’ll explore what LLD encompasses, its importance, and walk through a practical example in C# to bring these concepts to life. What Does LLD Cover? Low-Level Design focuses on: Class Design : Defining attributes, methods, and relationships between classes. Object Interactions : Explaining how objects collaborate to fulfill functionality. Algorithm Design : Writing detailed logic for processing data. Database Schema : Mapping data needs into relational tables or NoSQL structures. Validation and Error Handling : Planning for edge cases, exceptions, and input validation. How Does LLD Differ from HLD? Practical Example: Online Library System Scenario You’re tasked with designin...
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