C#

15 lessons — from the very basics to pro-level patterns.

Basics

1. Variables & Data Types

int, string, bool, var — strong types made easy

2. Operators & Expressions

Math, logic, and the handy ?? operator

3. Strings & Interpolation

$"Hello {name}" — clean, readable text

4. Conditionals

if/else, switch with pattern matching, ternary

for, while, do-while, and foreach

Collections

6. Arrays & Lists

Fixed arrays and flexible List

Functions

ref, out, optional params, and overloading

Object-Oriented Programming

8. Classes & Objects

Properties, constructors, and access modifiers

9. Inheritance & Polymorphism

virtual, override, abstract, and sealed

10. Interfaces & Abstract Classes

Contracts and base classes in C#

Intermediate

11. Collections & Generics

Dictionary, HashSet, Queue, Stack — all generic

Query your data like a database — in C#

13. Exception Handling

try/catch/finally and the when filter

Advanced

Read and write files with using statements

15. Delegates, Events & Lambdas

Action, Func, and event-driven programming