Getting Started with .NET Core – Ebasiq

.NET Core is a free and open source cross-platform version of .NET for building websites, services, and console apps.
The project is primarily developed by Microsoft and released under the MIT License.
.NET Core Version 3.0.0 was released on September 23 2019.
To use .NET Core 3.0 with Visual Studio, you need Visual Studio 2019 v16.3 or later.

In this article, I will show how to get started with .NET Core Console application and ASP.NET Core Web Application from Windows Console.

.NET Core Console Application

Step 1: Download and install the .NET SDK (Software Development Kit)
URL: https://dotnet.microsoft.com/download

Step 2: Check the software installed correctly or not by running the below command from windows console

C:\Users\Girish>dotnet
Usage: dotnet [options]
Usage: dotnet [path-to-application]
Options:
  -h|--help         Display help.
  --info            Display .NET Core information.
  --list-sdks       Display the installed SDKs.
  --list-runtimes   Display the installed runtimes.
path-to-application:
  The path to an application .dll file to execute.
To see the .NET Core information run dotnet --info

Step 3: Now run the below command to create the new .NET Core console app

C:\Users\Girish>dotnet new console -o myConsoleApp

Now the console app will be created. Now go to the myConsoleApp and type dir to see the list of files it was created.

C:\Users\Girish\myConsoleApp>dir
...........
Directory of C:\Users\Girish\myConsoleApp
04-10-2019  02:01 PM    <DIR>          .
04-10-2019  02:01 PM    <DIR>          ..
04-10-2019  02:01 PM               178 myConsoleApp.csproj
04-10-2019  02:01 PM    <DIR>          obj
04-10-2019  02:01 PM               194 Program.cs
.............

Step 4: Now type the below command to run the program

C:\Users\Girish\myConsoleApp>dotnet run
Hello World!

Step 5: Let us modify the Program.cs code as below and run the program once again. Update the code as shown below

using System;

namespace myConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Welcome to .Net Core Hello World! Console Application");

        }
    }
}

Now save the file and run the application once again from command prompt.

C:\Users\Girish\myConsoleApp>dotnet run
Welcome to .Net Core Hello World! Console Application

ASP.NET Core Web Application

Step 1: Run the below code to create the application

C:\Users\Girish\>dotnet new webApp -o myNewWebApp --no-https

The webApp parameter selects what template to use when creating your app.
The -o parameter creates a directory named myWebApp where your app is stored.
The --no-https flag specifies not to enable HTTPS.

Step 2: To see the list of files created, enter the dir command as show below

C:\Users\Girish\myNewWebApp>dir
..................... 
Directory of C:\Users\Girish\myNewWebApp

04-10-2019  02:11 PM    <DIR>          .
04-10-2019  02:11 PM    <DIR>          ..
04-10-2019  02:07 PM               146 appsettings.Development.json
04-10-2019  02:07 PM               192 appsettings.json
04-10-2019  02:11 PM    <DIR>          bin
04-10-2019  02:07 PM               183 myNewWebApp.csproj
04-10-2019  02:11 PM    <DIR>          obj
04-10-2019  02:07 PM    <DIR>          Pages
04-10-2019  02:07 PM               719 Program.cs
04-10-2019  02:07 PM    <DIR>          Properties
04-10-2019  02:07 PM             1,445 Startup.cs
04-10-2019  02:07 PM    <DIR>          wwwroot

......................

Step 3: Now type the below command to run the application

C:\Users\Girish\myNewWebApp>dotnet run

Now the application is hosted locally and use http://localhost:5000/ in the browser to see the application

Step 4: Update the code inside the file myNewWebApp\Pages\Index.cshtml and Add the below h1 tag code inside the div tag

<h1> Welcome to ASP.NET Core Web Application </h1>

Step 5: Now save and run the application once again. Press Ctrl + C to shutdown the application