Zero-to-Expert Tutorial

C# and .NET Complete Learning Path

C# is a modern programming language for the .NET platform, used to build command-line tools, services, web APIs, desktop software, and cloud applications.

Starts from zero
94 lessons
15 modules
6 projects

Start Tutorial

Begin From ZeroNo prior subject knowledge is assumed.

Ordered ModulesFollow the curriculum in order without skipping prerequisites.

Complete ProjectsPlan, build, integrate, test, and refine real outcomes.

Direct Lesson AccessEvery curriculum item links directly to its lesson.

About this tutorial

Learn C# and .NET from the beginning

C# is a modern programming language for the .NET platform, used to build command-line tools, services, web APIs, desktop software, and cloud applications.

This continuous 94-lesson curriculum starts from zero, introduces every required tool and concept in order, and progresses through First Program, Workflow, C# Foundations, Object-Oriented C#, Collections Generics and LINQ, Modern C# Language Features before capstone work.

Who this tutorial is for

First-time C# learners, existing programmers, and backend developers seeking a structured route into professional .NET engineering.

Prerequisites

No previous C# and .NET experience is required. The opening curriculum begins with “What C# and .NET Are and What You Can Build” and introduces setup, accounts, software, terminology, and prerequisite checkpoints before advanced work.

Master curriculum

Complete C# and .NET Tutorial

Follow all 94 lessons in exact curriculum order. Open any lesson directly from the curriculum below and follow the modules in order.

Module 1

Start Here

2 lessons · Start from Zero

Lesson 1

What C# and .NET Are and What You Can Build

Start from Zero · Sequential Tutorial Lesson

Start from ZeroLesson Lesson 2

What You Need Before Learning C#

Start from Zero · Sequential Tutorial Lesson

Start from ZeroLesson

Module 2

Setup

4 lessons · Start from Zero

Lesson 3

Module 3

First Program

3 lessons · Beginner

Lesson 7

Module 4

Workflow

3 lessons · Beginner

Lesson 10

Module 5

C# Foundations

5 lessons · Beginner

Lesson 13

Module 6

Object-Oriented C#

6 lessons · Beginner

Lesson 18

Module 7

Collections Generics and LINQ

6 lessons · Intermediate

Lesson 24

Module 8

Modern C# Language Features

6 lessons · Intermediate

Lesson 30

Module 9

Practical .NET APIs and Application Basics

10 lessons · Intermediate

Lesson 36

Module 10

Async Concurrency and Runtime

6 lessons · Intermediate

Lesson 46

Module 11

ASP.NET Core APIs

6 lessons · Advanced

Lesson 52

Module 12

Entity Framework Core and Data

6 lessons · Advanced

Lesson 58

Module 13

Testing Architecture and Deployment

6 lessons · Professional

Lesson 64

Module 14

Projects and Capstones

24 lessons · Capstone

Project 1 · plan

Module 15

Finish and Continue

1 lessons · Completion

Lesson 94

Complete the C# and .NET Tutorial and Choose What to Learn Next

Completion · Tutorial Completion

CompletionLesson

Ready to begin?

Start at lesson 1 and follow the curriculum in sequence.

Start Tutorial

C# and .NET Complete Learning Path

Learn C# and .NET from the beginning

Who this tutorial is for

Prerequisites

What C# and .NET Are and What You Can Build

What You Need Before Learning C#

Install the .NET SDK on Windows macOS or Linux

Choose Visual Studio VS Code or Rider for C#

Verify dotnet on the Command Line

Create Your First C# Console Project

Understand the Files in a New .NET Project

Write Run and Change Your First C# Program

Use Console Input and Output for Beginner Programs

Build Run Debug and Clean a .NET Project

Understand Compiler Errors Runtime Errors and Warnings

Learn How to Read .NET API Documentation

Understand Variables Types and Type Inference

Use Operators Expressions and Control Flow

Work with Methods Parameters and Return Values

Understand Strings Dates and Numeric Types

Handle Exceptions and Validation in C#

Design Classes Objects and Constructors

Use Properties Fields and Encapsulation

Apply Inheritance and Polymorphism

Design with Interfaces and Abstractions

Use Records Structs and Value Semantics

Apply SOLID Principles in C#

Choose Lists Dictionaries Sets and Queues

Write Reusable Generic Types and Methods

Query Collections with LINQ

Use LINQ Projection Grouping and Joins

Understand IEnumerable and Deferred Execution

Optimize LINQ and Avoid Common Performance Traps

Use Pattern Matching Effectively

Work with Nullable Reference Types

Use Tuples Deconstruction and Discards

Understand Delegates Events and Lambdas

Use Attributes Reflection and Source Metadata

Create and Consume Extension Methods

Install and Manage NuGet Packages

Work with Files and Directories in .NET

Read and Write Data with Streams Readers and Writers

Serialize and Deserialize JSON with System Text Json

Call HTTP APIs Safely with HttpClient

Work with DateTime DateOnly TimeOnly and Time Zones

Use Configuration Files in .NET Applications

Use Environment Variables and User Secrets

Use Regular Expressions Without Making Code Unreadable

Build a Practical .NET Utility that Combines Files JSON Configuration and HTTP

Understand async and await

Use Tasks Cancellation and Timeouts

Build Concurrent Code Safely

Use Channels and Producer Consumer Patterns

Understand Memory Management and Garbage Collection

Measure Allocations and Improve .NET Performance

Build a Minimal API with ASP.NET Core

Use Controllers Routing and Model Binding

Configure Dependency Injection and Options

Implement Authentication and Authorization

Add Validation Problem Details and Error Handling

Version Document and Test REST APIs

Model Entities and DbContext

Create and Apply EF Core Migrations

Write Efficient EF Core Queries

Manage Relationships and Change Tracking

Handle Transactions Concurrency and Resilience

Test Data Access Without Fragile Mocks

Write Unit Tests with xUnit

Build Integration Tests with WebApplicationFactory

Use Logging Metrics and OpenTelemetry

Design Clean Architecture in .NET

Containerize a .NET Application

Deploy and Operate .NET Applications Reliably

Project: Understand Requirements and Plan Console expense tracker

Project: Build the Foundation of Console expense tracker

Project: Complete and Integrate Console expense tracker

Project: Test Debug Refine and Finish Console expense tracker

Project: Understand Requirements and Plan Domain-driven order library

Project: Build the Foundation of Domain-driven order library

Project: Complete and Integrate Domain-driven order library