Learn C# by running code

C# Learning Hub

Build strong C# and .NET skills with focused explanations, runnable examples, debugging practice, and 25 C#-specific exercises.

Explore C# topics

Understand the entry point and the structure of a C# console program.

Declare strongly typed values and constants in C#.

Compose and inspect text with modern C# string features.

Choose behavior with if statements and concise switch expressions.

Use for, foreach, and while loops safely.

Define reusable methods with named results and multiple return values.

Store ordered values and keyed data with generic collections.

Validate operations and recover from expected failures.

Model state and behavior together in a C# class.

Protect object invariants with validated properties.

Reuse and specialize behavior through a base class.

Call different implementations through one shared contract.