Short lessons on C# and .NET with code you can run, plus debugging practice. Follow a path from the basics, then practice with challenges.
Follow a path: short lessons first, then a challenge to check you can use the idea on your own.
From your first program to operators, input, conditions, loops, strings, arrays, collections, methods and exceptions, with a challenge after each topic.
Short, practical C# exercises: parsing input, formatting, dates, tuples, collections and custom exceptions.
Classes, encapsulation, inheritance, polymorphism, interfaces, records and generics.
Query, group, join and page data with LINQ, and extend collections with your own methods.
Callbacks, events, async/await, Task.WhenAll, resource cleanup and JSON for real-world C# programs.
LINQ, pattern matching, lambdas, async/await and JSON, with challenges to apply them.
Understand the entry point and the structure of a C# console program.
View lesson →Use arithmetic, assignment, comparison and logical operators in C#, plus the Math class.
View lesson →Read what the user types with Console.ReadLine and convert it safely with int.TryParse.
View lesson →Choose behavior with if statements and concise switch expressions.
View lesson →Define reusable methods with named results and multiple return values.
View lesson →