C# SELF

Never programmed in C#? No problem! This 66-level quest will take you from zero to pro. You will learn the basics of C# syntax, learn how to create classes and objects, master OOP principles and work with collections. Then dive into advanced topics: LINQ for working with data, asynchronous programming, multithreading and events. Learn how to work with files, data serialization, master the modern capabilities of C# 14 and .NET 9. And also study regular expressions, reflection and best practices of enterprise development. You will master JetBrains Rider, learn to write code like a real C# developer.

Level 1
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Commands and the first program
Level 2
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Introduction to int and string types. Keyboard Input
Level 3
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Conditional Operator
Level 4
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Cycles
Level 5
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Installing IDE, Codegym Plugin
Level 6
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Real Numbers
Level 7
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Arrays
Level 8
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Functions (Methods)
Level 9
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Advanced String Handling
Level 10
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Constants, Structures, Enum, and Switch
Level 11
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Tuples and Local Functions
Level 12
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Classes and Objects
Level 13
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Exceptions try, catch, finally
Level 14
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Nullable Reference Types (NRT)
Level 15
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Working with Dates, Time, and Timezones
Level 16
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Classes and Constructors
Level 17
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Properties and Access Modifiers
Level 18
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Indexers and Extension Members
Level 19
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DTO, record, and with
Level 20
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Inheritance and Class Hierarchy
Level 21
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Polymorphism and Method Overloading
Level 22
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Abstraction and Abstract Classes
Level 23
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Interfaces: Basics and Contracts
Level 24
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Advanced Interfaces
Level 25
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Typical Mistakes and OOP Best Practices
Level 26
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Version Control: Working with Git and GitHub
Level 27
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Collection Types and Generics
Level 28
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Main Collection Interfaces
Level 29
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Working with Collections
Level 30
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Comparators and Comparison objects
Level 31
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LINQ Basics: Simple Queries and Data Filtering
Level 32
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Advanced LINQ: Grouping and Aggregate Functions
Level 33
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Advanced LINQ: Joins and Projections
Level 34
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Optimizing Work with Collections
Level 35
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Basics of Working with Files in C#
Level 36
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Reading and Writing Files
Level 37
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Working with File Encodings
Level 38
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Handling Errors When Working with Files
Level 39
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Working with the File System
Level 40
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Managing Files and Directories
Level 41
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Optimizing Input/Output
Level 42
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Asynchronous File Operations
Level 43
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The Concept of Data Serialization
Level 44
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Classes and Libraries for Serialization
Level 45
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Configuring Object Serialization
Level 46
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Serialization of Collections
Level 47
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Working with JSON Data
Level 48
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Working with XML Data
Level 49
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Lambda Expressions in C#
Level 50
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The Relationship between Lambda Expressions and Delegates
Level 51
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Functional Programming
Level 52
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Events in C#: Concept, Creation, and Processing
Level 53
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Event Life Cycle
Level 54
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Best Practices for Event-Driven Programming
Level 55
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Multithreading Basics in C#
Level 56
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Thread Synchronization
Level 57
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Common Multithreading Issues
Level 58
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Thread-Safe Collections
Level 59
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Asynchronous Programming
Level 60
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Using Tasks: Task
Level 61
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Error Handling in Asynchronous Code
Level 62
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A Deep Dive into Asynchrony
Level 63
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Reflection and Dynamic Types
Level 64
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Logging, Monitoring, and Tracing
Level 65
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Memory Structure in .NET
Level 66
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Final Project