C# & .NET Learning Path

This learning path guides you through everything required to grow into a skilled modern C# and .NET developer. You’ll start by mastering the language basics, then advance into key .NET capabilities, and ultimately learn how to build clean, reliable, and high-performance applications by applying modern development practices.

Core Language Foundations

Learn the fundamentals of the C# language, from syntax and key features to safe handling of null values.

Getting Started: C#

Getting Started: C#

Get started with programming using the C# programming language

5h 7m Getting Started
Nick Cosentino Nick Cosentino
Deep Dive: C#

Deep Dive: C#

Deep dive into the C# programming language and learn more features and patterns

6h 28m Deep Dive
Nick Cosentino Nick Cosentino

.NET Fundamentals

Build a strong foundation in essential .NET concepts like dependency injection, logging, configuration, and reflection.

Writing Quality Code

Master testing and code quality practices in C#, including unit testing, integration testing, TDD, refactoring, clean code, and SOLID principles.

Advanced .NET Concepts

Dive deeper into advanced .NET development with source generators.

Creational Design Patterns in C#

Learn how to create objects in flexible and reusable ways using classic creational design patterns.

Structural Design Patterns in C#

Understand how to compose classes and objects into larger structures with structural design patterns.

Behavioral Design Patterns in C#

Master behavioral design patterns to manage algorithms, relationships, and responsibilities between objects.

What's New

What's new in C# 14
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What's new in C# 14

This guide covers every new C# 14 feature, explains its benefits, and provides practical code examples to help you navigate how you can use them.

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Let's Build It: AI Chatbot with RAG in .NET Using Your Data
course

Let's Build It: AI Chatbot with RAG in .NET Using Your Data

Build a Retrieval-Augmented Generation (RAG) chatbot that can answer questions using your data.

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Working with Large Language Models
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Working with Large Language Models

Learn how to work with Large Language Models (LLMs). Understand the fundamentals of how GPT works, the transformer architecture, and master prompt engineering techniques to build AI agents.

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From Zero to Hero: SignalR in .NET
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From Zero to Hero: SignalR in .NET

Enable enterprise-grade real-time communication for your web apps with SignalR.

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Deep Dive: Solution Architecture
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Deep Dive: Solution Architecture

Master solution architecture and turn business needs into scalable, maintainable systems.

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Migrating: ASP.NET Web APIs to ASP.NET Core
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Migrating: ASP.NET Web APIs to ASP.NET Core

A step-by-step process to migrate ASP.NET Web APIs from .NET Framework to ASP.NET Core.

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Getting Started: Caching in .NET
course

Getting Started: Caching in .NET

Let's make the hardest thing in programming easy for .NET software engineers.

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From Zero to Hero: Testing with xUnit in C#
course

From Zero to Hero: Testing with xUnit in C#

Learn how to test any codebase in .NET with the latest version of xUnit, the industry-standard testing library.

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Create a ChatGPT Console AI Chatbot in C#
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Create a ChatGPT Console AI Chatbot in C#

This walkthrough is your hands-on entry point to create a basic C# console application that talks to ChatGPT using the OpenAI API.

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