C# 14 · .NET 10 · Visual Studio 2026

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40 lessons · Beginner → Expert · ~25 hours of content · Free

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Program.cs — C# 14 · .NET 10

1// C# 14 — top-level statements, primary constructors, collection expressions
2using Microsoft.Extensions.DependencyInjection;
3
4var services = new ServiceCollection()
5    .AddSingleton<IGreeter, Greeter>()
6    .BuildServiceProvider();
7
8var greeter = services.GetRequiredService<IGreeter>();
9greeter.Greet(["Alice", "Bob", "World"]);
10
11public interface IGreeter { void Greet(string[] names); }
12
13// Primary constructor — C# 14
14public class Greeter(ILogger<Greeter> logger) : IGreeter
15{
16    public void Greet(string[] names)
17    {
18        foreach (var name in names)
19            logger.LogInformation($"Hello, {name}!");
20    }
21}

40+

Lessons

25h

Content

C#14

Latest Version

.NET10

Framework

Cost

Free tutorial + premium guide. Start with the lessons here, then use the book for a more complete, structured C# learning path.

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Curriculum overview

Everything you need to
become a C# expert

This isn't a surface-level tutorial. Each lesson goes deep — with real code, working examples, and the patterns used in production systems at scale.

⚡

C# 14 Language Features

Primary constructors, collection expressions, interceptors, the field keyword, and all the latest syntax innovations.

🏗️

Object-Oriented Programming

Classes, interfaces, inheritance, polymorphism, encapsulation — with advanced patterns like SOLID and design patterns.

🔄

Async / Await & Concurrency

Task-based async programming, ValueTask, IAsyncEnumerable, channels, and avoiding deadlocks in real apps.

🔍

LINQ & Functional Patterns

Master LINQ for objects, EF Core queries, deferred execution, and applying functional programming ideas in C#.

🧬

Generics & Type System

Generic classes, methods, constraints, covariance, contravariance, and leveraging the full power of C#'s type system.

🚀

Performance & Memory

Span<T>, Memory<T>, ArrayPool, ref structs, unsafe code, and writing zero-allocation hot paths.

🌐

ASP.NET Core & Web APIs

Build production REST APIs with minimal APIs, controller-based APIs, middleware, authentication, and OpenAPI.

🗃️

Data Access & EF Core

Entity Framework Core 10, Dapper, repositories, unit of work, migrations, and query optimization.

🧪

Testing & Code Quality

xUnit 3, NSubstitute mocking, FluentAssertions, TDD workflow, integration testing, and code coverage.

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C# & .NET 10 — Getting Started

FoundationsBeginner

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Variables, Types & Operators

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Control Flow — if, switch, loops

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