C# Hello World Program (Using Main Method and Console.WriteLine)

This tutorial walks you through writing the Hello World program in C#. If you're new to C# or .NET, this is the perfect place to begin.

Whether you're searching for:

• Hello World for C#

• C# Console Application Hello World

• C# Basic Program Example

This article is designed for you!

Introduction

The Hello World program in C# introduces basic syntax including namespaces, classes, the Main() method, and the Console.WriteLine() function. It’s a foundational step for learning the language.

Basic C# Hello World Program

// HELLO WORLD PROGRAM IN C# USING MAIN METHOD
// C# Console.WriteLine() function
// C# static Main method

using System;

class W3CW {
    // It's the main function of the program
    static public void Main(string[] args) {
        // Step-1 Display a label message
        Console.WriteLine("C# HELLO WORLD PROGRAM");

        // Step-2 Print the actual Hello World message
        Console.WriteLine("HELLO, WORLD!");
    }
}

Run

Output

Using a Function

// C# HELLO WORLD PROGRAM USING A SEPARATE FUNCTION

using System;

class W3CW {
    // This function prints the hello world messages
    static void PrintMessage() {
        Console.WriteLine("C# HELLO WORLD PROGRAM");
        Console.WriteLine("HELLO, WORLD!");
    }

    static public void Main(string[] args) {
        // Call the function to print the message
        PrintMessage();
    }
}

Run

Using a Loop

// C# HELLO WORLD PROGRAM USING FOR LOOP

using System;

class W3CW {
    static public void Main(string[] args) {
        // Step-1 Label message
        Console.WriteLine("C# HELLO WORLD PROGRAM");

        // Step-2 Repeat Hello World 3 times using loop
        for (int i = 0; i < 3; i++) {
            Console.WriteLine("HELLO, WORLD!");
        }
    }
}

Run

Common Mistakes to Avoid

• Forgetting to include using System;

• Misspelling Main method or incorrect access modifiers.

• Omitting static keyword in Main() method.

• Forgetting semicolons after statements.

FAQs

Q: Do I need Visual Studio to write C#?
A: Not necessarily. You can also use VS Code, JetBrains Rider, or the dotnet CLI.

Q: Why is Main() static in C#?
A: Because it is the entry point and needs to be called without creating an object.

Q: What is Console.WriteLine()?
A: It is a built-in method to print output on the console.