C# Tutorial

Official Documentation

This tutorial is based on official Microsoft C# documentation. Visit: C# Documentation

Welcome to the C# tutorial! C# (pronounced "C-sharp") is a modern, object-oriented programming language developed by Microsoft.

What is C#?

┌─────────────────────────────────────────────────────────────┐
│                         C# Language                         │
├─────────────────────────────────────────────────────────────┤
│  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐  │
│  │   Type      │  │   Object-   │  │    Modern           │  │
│  │   Safety    │  │   Oriented  │  │    Features         │  │
│  └─────────────┘  └─────────────┘  └─────────────────────┘  │
├─────────────────────────────────────────────────────────────┤
│                    .NET Runtime (CLR)                       │
├─────────────────────────────────────────────────────────────┤
│  Windows  │  macOS  │  Linux  │  iOS  │  Android  │  Web   │
└─────────────────────────────────────────────────────────────┘

Why Learn C#?

Feature	Description
Versatile	Build web, desktop, mobile, games, and cloud applications
Type-Safe	Catch errors at compile time with strong typing
Modern Syntax	Clean, readable code with powerful features
Enterprise Ready	Battle-tested in large-scale applications
Cross-Platform	Run on Windows, macOS, Linux, and more
Game Development	Primary language for Unity game engine

What You'll Learn

Beginner

• Getting Started - Setup and first program
• Variables & Types - Data types and variables
• Control Flow - Conditions and loops

Intermediate

• Methods - Functions and parameters
• Classes & Objects - Object-oriented basics
• Inheritance - Code reuse and polymorphism

Advanced

• Interfaces - Contracts and abstraction
• Generics - Type-safe reusable code
• LINQ - Language Integrated Query
• Async Programming - Asynchronous patterns

Prerequisites

• ✅ Basic programming concepts
• ✅ Understanding of variables and functions
• ⭐ Optional: Experience with any C-style language

Quick Preview

using System;

// Hello World in C#
class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, World!");

        // Variables and types
        string name = "Developer";
        int age = 25;
        bool isLearning = true;

        // String interpolation
        Console.WriteLine($"Hi {name}, you are {age} years old!");

        // Collections
        var languages = new List<string> { "C#", "Python", "JavaScript" };

        foreach (var lang in languages)
        {
            Console.WriteLine($"I know {lang}");
        }
    }
}

Setting Up Your Environment

Install .NET SDK

Windows

# Download from https://dotnet.microsoft.com/download
# Or use winget:
winget install Microsoft.DotNet.SDK.8

macOS

# Using Homebrew:
brew install dotnet-sdk

# Or download from https://dotnet.microsoft.com/download

Linux

# Ubuntu/Debian:
sudo apt-get update
sudo apt-get install -y dotnet-sdk-8.0

# Fedora:
sudo dnf install dotnet-sdk-8.0

Verify Installation

dotnet --version

Create Your First Project

# Create a new console application
dotnet new console -n MyFirstApp

# Navigate to project folder
cd MyFirstApp

# Run the application
dotnet run

Project Structure

MyFirstApp/
├── MyFirstApp.csproj    # Project configuration
├── Program.cs           # Main entry point
├── obj/                 # Build objects
└── bin/                 # Compiled output

Recommended IDEs

IDE	Description
Visual Studio	Full-featured IDE (Windows/Mac)
VS Code	Lightweight editor with C# extension
JetBrains Rider	Cross-platform professional IDE

Video Tutorials

Recommended Video Resources

Learn C# through these excellent tutorials.

Free Courses

Course	Creator	Description
C# Fundamentals	freeCodeCamp	Complete C# course for beginners
C# Tutorial	Bro Code	Full C# programming tutorial
C# Full Course	Caleb Curry	Comprehensive C# tutorial

Let's Begin!

Ready to start? Head over to Getting Started to write your first C# program!