Explain the First Program of C#

Here is the First Program in C# Language,

Codes – First Program of C#

using System;

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

Explanation – Line By Line

using System;

• The Line includes the system namespace, which is a collection of classes, such as “console” that provide commonly used functionalities. It allow the program to use methods from the system library without needing to fully qualify them.

namespace HelloWorld

• A namespace is a container for classes and other types. It helps organize code and prevents name conflicts. Here, “HelloWorld” is the name of the namespace.

class Program

• Classes are the building blocks of C# programs. A class defines a type, including its data and behavior. Program is the name of this class.

static void Main(string[] args)

• This line defines the Main method, which is the entry point of a C# application.
• static: The method belongs to the class itself rather than an instance of the class.
• void: The method does not return a value.
• Main: The name of the method. It is case-sensitive and must be capitalized.
• string[] args: An array of strings representing command-line arguments passed to the application.

{

• This opening brace marks the beginning of the Main method’s body.

Console.WriteLine("Hello, World!");

• This line outputs the text “Hello, World!” to the console.
• Console: A class in the System namespace that provides methods for interacting with the console.
• WriteLine: A method of the Console class that writes a line of text to the console.
• "Hello, World!": A string literal that represents the text to be printed.