Understanding a typical C# program

Before we start writing a program in C#, let's first go back to day one, where we discussed the various IDEs and editors that are helpful in writing programs/applications using the C# language. Revisit day one and understand various editors and IDEs and check why we should go with one of our choice. We will be using Visual Studio 2017 update 3 for all our examples in this book.

To get start with a simple C# program (we will create a console application), follow these steps:

1. Initiate your Visual Studio.
2. Go to File | New | Project (or ctrl +Shift + N).
3. Under Visual C# node, select .NET Core and then select Console App.
4. Name your program, say, Day02, and click on OK (see highlighted text in the following figure):

You will get the following code in class Program.cs – this is the default code provided by Visual Studio; you can amend it as per your need:

using System; 
 
namespace Day02 
{ 
class Program 
    { 
     static void Main(string[] args) 
        { 
         Console.WriteLine("Hello World!"); 
        } 
    } 
} 

By hitting the F5 key on your keyboard, you will run the program in Debug mode.

You can see the following output when the program runs:

Before moving further, let's analyze the following figure of our console application on Visual Studio:

The preceding figure depicts a typical C# program; we are using Visual Studio, but the console program remains unchanged across different IDEs or editors. Let's discuss this in more detail.