Part 1 - Introduction to C#

We will learn about

• How to create First Console Application.
• Basic Structure of a C# Program.
• What is a Namespace.
• What is the Purpose of Main Method.

To create and run a console application

• Start Visual Studio.

• On the menu bar, choose File, New, and Project.

• The New Project dialog box opens.

• Expand Installed, expand Templates, expand Visual C#, and then choose Console Application.

• In the Name box, specify a name for your project, and then choose the OK button.

First Program 

// Namespace Declaration
using System;

class PurushTutorial
{
    public static void Main()
    {
        //Write to Console
        Console.WriteLine("Learning C#");
    }
}

Using System Declaration

The namespace declaration, using System, indicates that we are using the System namespace.

A Namespace is used to organize our code and it is collection of classes, interfaces, structs, enums and delegates.

Main Method is the entry point in our Console Application - The execution of our code starts from the first line written in the Main method  

Example - In the above program, execution starts from  "Console.WriteLine("Learning about C#");" ignoring the comment