Learnerslesson
Learnerslesson

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C# - Basic

​

Why should you learn C# ?

​
  1. Popular language

    C# is considered as one of the most popular language in the World.
  2. ​
  3. Easy to learn for C++ and C# programmers

    As the syntax and features of C# is quite similar to C++ and java. It becomes easy for C++ and java programmers to learn C#.
  4. ​
  5. Object Oriented Programming Language

    C# is an Object Oriented Programming Language which provides all the features of Object Oriented Programming Language that gives a proper structure to your project.
​

First C# Application

​ ​

Let us write our first C# Application which just prints 'Hello World' on the screen.

​

Example :

​
public class FirstApplication
{
    public static void Main(string[] args)
	{
        System.Console.WriteLine ("Hello World");
    }
}
​

Output :

​

   Hello World
​

Let us dissect the above code and understand in detail:

​
  1. So, in the above code we are printing 'Hello World' using the below statement, ​

    System.Console.WriteLine("Hello World");

    ​ We do not have to dig much into individual component in the output statement for now. We can just remember, 'System.Console.WriteLine()' is the statement used to System.Console.WriteLine something on the screen.
  2. ​ ​
  3. Since, C# is said to be an object oriented programming language. All C# programmes should be written inside a class. 'FirstApplication' is the name of the class inside which we have to write our code : ​

    public class FirstApplication
    {
        ...
    }
    
    ​
    Note : We have a separate tutorial on 'Class'. For now, you do not have to dive more into 'Class'.
  4. ​
  5. Inside the class 'FirstApplication', we have the main() method. The main() method is the entry point of a standalone C# application. So, C# executes the code written inside the main() method : ​

    public static void Main(string[] args)
    {
        System.Console.WriteLine ("Hello World");
    }
    

    Since, 'System.Console.WriteLine ("Hello World")' is inside the main() method, it c-sharp-t printed.
  6. ​
​

Moral of the Story

​

We have to write all our codes inside the main method. And the main method should be inside a class.

​

Example :


public class FirstApplication
{
    public static void Main(string[] args)
    {
        //OUR CODE SHOULD BE WRITTEN HERE.
    }
}
​

The next thing that comes to our mind is, where do we write the above C# code? And how do we run it?

​

Well! We have the answers in the next tutorial.