C# Tutorial

Introduction to C#

C# (pronounced "C-Sharp") is a simple, modern, general-purpose, object-oriented programming language developed by Microsoft within its .NET initiative led by Anders Hejlsberg. It is widely used for the following:

• Web Development (ASP.NET)
• Desktop Applications (Windows Forms, WPF)
• Game Development (Unity)
• Cloud & AI Applications

Write, Compile, & Run C# Code Instantly

Our C# tutorial allows you to execute code inline without leaving the page unlike other sites. Learn C# hands-on with real-time coding experience right here!

Main features of this tutorial:

• Best for Beginners & Experienced Developers
• Covers Basic to Advanced Topics
• Interactive Compilation - No Setup Needed!

Click the Edit & RUN button to RUN or EDIT this code.

using System;
class Program{
    static void Main(string[] args){
        Console.WriteLine("Welcome to TutorialsPoint");
    }
}

Why Learn C#?

• Versatile Used in Web, Mobile, and Game Development
• Easy to Learn Similar to Java & C++
• Powerful & Secure Type-safe and managed by the .NET runtime

Getting Started with C#

To run C# programs, you need the following tools:

• .NET SDK (Download from dotnet.microsoft.com)
• A Code Editor (VS Code, Visual Studio, or any online compiler)

But wait! You dont need to install anything. Run the examples below right here in our tutorial!

First C# Program "Hello, World!"

Run This Code Instantly by clicking Edit & Run button!

using System;

class Program
{
    static void Main(string[] args)
    {
        // Tp print "Hello, World!"
        Console.WriteLine("Hello, World!");
    }
}

Explanation:

1. using System; Imports System namespace for basic functions
2. class Program Defines a class named Program
3. static void Main() Entry point of the program
4. Console.WriteLine() Prints text to the console

C# Syntax & Basics

C# programs follow a structured format. Heres an example with variables, data types, and user input:

Test the code below by clicking Edit & Run button! You can modify the values and run the code to practice well.

using System;

class Program
{
    static void Main()
    {
        int age = 25;
        string name = "Alice";

        Console.WriteLine("Name: " + name);
        Console.WriteLine("Age: " + age);
    }
}

C# Variables & Data Types

Data Types in C#

Try the Example Below!

using System;

class Program
{
    static void Main()
    {
        double price = 99.99;
        bool isAvailable = true;

        Console.WriteLine("Price: $" + price);
        Console.WriteLine("In Stock: " + isAvailable);
    }
}

Modify values & test!

C# Control Statements

Control flow statements help in decision-making and looping.

If-Else Statement

Run This Conditional Check!

using System;

class Program
{
    static void Main()
    {
        Console.Write("Enter your age: ");
        int age = Convert.ToInt32(Console.ReadLine());

        if (age >= 18)
            Console.WriteLine("You are eligible to vote!");
        else
            Console.WriteLine("Sorry, you must be 18+ to vote.");
    }
}

Modify values & test!

Loops in C#

C# supports various loops:

Try a Simple Loop:

using System;

class Program
{
    static void Main()
    {
        for (int i = 1; i <= 5; i++)
        {
            Console.WriteLine("Iteration: " + i);
        }
    }
}

Modify the loop condition and see what happens!

C# Functions & Methods

Functions in C# allow code reusability.

Run This Function Example

using System;

class Program
{
    static void Greet(string name)
    {
        Console.WriteLine("Hello, " + name + "!");
    }

    static void Main()
    {
        Greet("Alice");
        Greet("Bob");
    }
}

Modify the function call with different names!

OOP in C# (Classes & Objects)

C# is object-oriented, meaning it uses classes & objects.

Create & Use Objects

using System;

class Car
{
    public string Brand;

    public void ShowBrand()
    {
        Console.WriteLine("Car Brand: " + Brand);
    }
}

class Program
{
    static void Main()
    {
        Car myCar = new Car();
        myCar.Brand = "Tesla";
        myCar.ShowBrand();
    }
}

Change Brand and see different outputs!

C# File Handling (Read & Write)

Read & Write Files in C#. Try this code on your local computer.

using System;
using System.IO;

class Program
{
    static void Main()
    {
        File.WriteAllText("test.txt", "Hello, C#!");
        string content = File.ReadAllText("test.txt");
        Console.WriteLine("File Content: " + content);
    }
}

This will create a file called test.txt in your local directory. Check the content of the file.

Why Learn C# with Us?

• Best Structured Tutorials Covers all levels
• Inline Code Compilation No need to leave the page!
• Practical Real-World Examples Hands-on learning

Who Should Learn C#?

C# is perfect for beginners, software developers, game developers, and enterprise professionals. Whether you're building Windows applications, web apps, mobile apps (Xamarin), Unity games, or AI solutions, C# is a versatile and powerful language.

• Beginners & Students Easy-to-learn syntax, strong OOP foundation
• Software & Web Developers Ideal for .NET, ASP.NET, and full-stack development
• Game Developers Primary language for Unity 3D
• Mobile Developers Build cross-platform apps with Xamarin
• AI & Machine Learning C# supports ML.NET for AI applications

Start learning C# today and unlock endless opportunities in tech!

Prerequisites to Learn C#

C# is beginner-friendly, but having some basic knowledge can make learning easier:

• Basic Understanding of Programming Concepts (Optional but helpful)
• Familiarity with Any Programming Language (C, C++, Java, or Python)
• Logical Thinking & Problem-Solving Skills
• Basic Knowledge of OOP (Object-Oriented Programming) (Recommended)
• A Computer with .NET SDK & a Code Editor (Visual Studio, VS Code, or an online compiler)

No prior coding experience? No worries! Our tutorial covers everything from scratch.