Architecture & Design - Step by Step
Start with OOP foundations, internalize SOLID with real conflicts, learn the design patterns you will actually use, then lock down the browser side with CORS, Same-Origin Policy, and CSP.
What you'll learn
Follow in order: each step builds on the previous one.
- 1Step 14 min readFull guide
The Four Pillars of OOP Explained with Real-World Analogies
Understanding Object-Oriented Programming through everyday examples.
- 2Step 26 min readFull guide
SOLID Principles
A guide to SOLID principles.
- 3Step 35 min readFull guide
OOP Design Patterns: The Ultimate Guide for Beginners
Master the most important design patterns with practical examples.
- 4Step 45 min readFull guide
Understanding CORS in Modern Web APIs
A clear and practical guide to CORS, origins, preflight requests, and real API security strategies.
- 5Step 57 min readFull guide
CORS vs CSP vs Same-Origin Policy
A clear comparison of Same-Origin Policy, CORS, and Content Security Policy. Understand how these three browser security mechanisms work together and when to use each.
- 6Step 615 min readFull guide
API Gateway for Beginners: From Basic Routing to Production-Ready Microservices
Learn why microservices need an API Gateway and how to build one in .NET with Ocelot. Explore routing, environment configuration, JWT authentication, rate limiting, caching, health checks, IP whitelisting, circuit breakers, CORS, messaging, logging, metrics, deployment, and scaling.