Basic Structure of a C# Program | Hello World Example

🚀 Basic Structure of a C# Program

C# is a simple, modern, and type-safe programming language developed by Microsoft. Every C# application starts with a class and a Main() method. Let’s explore the basic structure using a simple Hello World example.

📄 Example: Hello World in C#

using System;

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

📝 Sample Output

Hello, World!

🔍 Explanation

• using System; – Includes the System namespace which contains basic classes like Console.
• namespace HelloWorldApp – Organizes code and avoids name conflicts.
• class Program – Declares a class named Program.
• static void Main(string[] args) – Entry point of the application. The program starts execution here.
• Console.WriteLine() – Prints output to the console.

💡 Notes

• C# is case-sensitive.
• Every statement ends with a semicolon (;).
• Code must be inside a class or struct.
• Main() can also return int instead of void if needed.