C# · Introductory

Lesson 1 · On the house

Hello C#

Top-level statements, Console.WriteLine, dotnet new console, and dotnet run.

Lesson 2

Variables and types

int, double, decimal, bool, char, string; var inference; const.

Lesson 3

Strings

Interpolation, verbatim and raw strings, common methods, and immutability.

Lesson 4

Control flow

if/else, switch statements and expressions, and the ternary operator.

Lesson 5

Loops

for, while, do-while, foreach, break and continue.

Lesson 6

Methods

Declaring methods, parameters, return types, overloads, and expression bodies.

Lesson 7

Arrays and List<T>

Fixed arrays, List<T> Add/Remove/Count, indexing, and ranges.

Lesson 8

Classes and objects

Fields, properties, constructors, methods, and new.

Lesson 9

Null and nullable types

Nullable reference types, int?, ?. and ?? operators, and null warnings.

Lesson 10

Exceptions

try/catch/finally, throw, exception filters, and using for disposal.