Watching tutorials won’t make you a C# developer. Writing code will. You’ve watched the videos and read the docs, but when you open a blank editor or sit in a technical interview, the code doesn’t come. This course fixes that the only way it can be fixed: through structured, hands-on practice. This is a practice-first C# course with 93 coding exercises that take you from your first if statement to thread-safe, asynchronous, enterprise-style systems. Every exercise is a real problem you solve yourself, in your browser, with instant feedback. How the course is structured Beginner Tier (25 exercises): Build core fluency with variables, conditionals, loops, strings, and arrays. You’ll solve classic problems like prime checks, palindromes, Fibonacci, factorials, leap years, and duplicate removal.
Intermediate Tier (30 exercises): Write professional object-oriented code. You’ll practice classes, encapsulation, inheritance, abstract classes, overloading, List<T>, Dictionary, Queue, Stack, HashSet, IComparer<T>, generic repositories, custom exceptions, file I/O, CSV processing, and 12 LINQ challenges covering filtering, grouping, joins, and aggregation. Advanced Tier (30 exercises): Tackle what separates mid-level from senior developers: delegates, events, records, generic constraints, Result<T>, the Strategy and Factory patterns, dependency injection, thread-safe singletons and caches, async/await, Task.WhenAll, cancellation, retry logic, parallel processing, async pipelines, and reflection.
