.NET Core Application Development in Visual Studio Code

.NET Core

ASP.NET Core is an open source and platform-independent software framework for developing web, mobile, and desktop-based applications using Windows, Mac, and Linux operating systems (a developer can develop the desktop application from .NET Core 3.0). command line interface for developing the applications be supported by .NET

ASP.NET Core fully supports C#, F#, and partially supports VB.NET. Now a days, VB.NET compiles and runs on .NET Core, but the separate Visual Basic Runtime is not implemented. Microsoft tells that the latest version, .NET Core 3 will include the Visual Basic Runtime.

Why .NET Core?

Due to the following reasons, developers should use the .NET Core framework for development.

Cross-Platform Development
Targeting Microservices.
Lightweight
Docker Containers support
High-performance and scalable systems
Side-by-side .NET versions per application.

Almost all of the developers that is .NET developers are accustomed to developing applications using the Visual Studio IDE from Microsoft. But this has a limitation that Visual Studio was a Windows application.

This meant that you needed a Windows OS machine to develop .NET applications using Visual Studio. But with the introduction of .NET Core, which is both open source and cross-platform, Microsoft turned over a new leaf. .NET Core, a total rewrite of the .NET Framework came with a CLI tool, referred to as .NET CLI, can be used by developers who don’t wish to use Visual Studio for developing .NET applications with the help of command line and just a text editor of their preference.

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For developing our first .NET Core application using Visual Studio Code we will use the .NET CLI tool.

1.Create an empty folder. Name it DotNet Core Sample. Right click on that folder. From the displayed context menu, select Open with Code option. This will open the Visual Studio Code with a selected folder as your workspace.

2.Use Ctrl+` (backtick character) shortcut to open the built-in terminal in Visual Studio Code.

3.We will be creating a basic console application using the dotnet CLI. Type dotnet new console –name DotNetCoreSample in the terminal window and press Enter. The .NET CLI tool will create a console application with a Program.cs file and will restore the packages required for the project. See the figure below.

4.We will be creating a basic console application using the dotnet CLI. Type dotnet new console –name DotNetCore Sample in the terminal window and press Enter. The .NET CLI tool will create a console application with a Program.cs file and will restore the packages required for the project. See the figure below.

5.In the Program.cs file, change the Hello World string to My First .NET Core Program. Save the file and go to the terminal.

6.Navigate to the directory in which Program.cs is located from the terminal. Type cd DotNetCoreSample and press Enter. Now, type the command dotnet run in the terminal and press Enter.

now we have created a simple .NET Core console application using Visual Studio Code. We have leveraged the new .NET CLI commands to create and run the project.

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ASP.NET – Introduction

ASP.NET is a web development platform, which provides a programming model,provided by Microsoft.It is used for creating web-based application.A comprehensive software infrastructure and various services required to build up robust web applications for PC should be provided in asp.net, as well as mobile devices.ASP.Net was first released in the year 2002.

The first version of ASP.Net deployed was 1.0. The most recent version of ASP.Net is version 4.6.ASP.NET works on top of the HTTP protocol, and uses the HTTP commands and policies to set a browser-to-server bilateral communication and cooperation.ASP.Net is designed to work with the HTTP protocol. across all web applications,this is the standard protocol used .

Following are the ASP.Net applications can also be written in a variety of .Net languages.

1.C#,

2.VB.Net

3.J#

4.Jscript

ASP.NET is a part of Microsoft .Net platform. ASP.NET applications are written using the extensible and reusable components or objects present in .Net framework. These codes can use the entire hierarchy of classes in .Net framework.

ASP.NET is used to produce interactive, data-driven web applications over the internet.The full form of ASP is Active Server Pages, and .NET is Network Enabled Technologies.

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A Web-based application is developed by using ASP.Net framework

characteristics

Following are some of the key characteristics of the ASP.Net frameworkfull form of ASP is Active Server Pages, and .NET is Network Enabled Technology

1.Language

2.Library

3.Common Language Runtime

ASP.Net is basically a development language. It is used for constructing web-based applications. ASP.Net is produced to work with the standard HTTP protocol.

Components of .Net Framework

1.Common Language Runtime or CLR

2.Net Framework Class Library

3.Common Language Specification

4.Common Type System
5.Metadata and Assemblies

6.Windows Forms

7.ASP.NET and ASP.NET AJAX

8.ADO.NET

9.Windows Workflow Foundation (WF)

10.Windows Presentation Foundation

11.Windows Communication Foundation (WCF)

12.Windows CardSpace

13.LINQ

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Introduction to the C# language using. net framework

C# is the most popular object-oriented programming language developed by Microsoft and dem.net Framework is running.

C # syntax is very similar to C++ or Java language. C# is mainly used for desktop applications that develop enterprise grade web applications, mobile applications and games, etc.

the Beginner section is the right choice to start if you want to become a C# Developer. Learn more about C# version history, data types, C# functions, variables, decision commands, etc.

C # Language

The C# syntax is very expressive, and it is also simple and easy to learn.

C# supports generic types and methods that offer performance and enhanced type safety, and iterators that allows implementers of collection classes to define custom iteration behaviors that are simple to use by client code. Language-Integrated Query (LINQ) expressions make the strongly-typed query a first class construct.Developers who know one of these languages can normally work productively in C# within a very short time.

C# supports the concepts of polymorphism, encapsulation, inheritance, and. All variables and methods, including the main method, the application’s entry point, etc.

In C#, a structure is like a lightweight class; it is a stack-allocated type that can implement interfaces but does not support inheritance.

Below are the basic object-oriented principles that makes C# easy to develop software components through multiple innovative language.

1.In addition to these object-oriented principles, C# facilitates the development of software components through several innovative language constructs.

2.What do you mean?Properties that act as accessors for private member variables.

3.Attributes that provide declarative metadata about types at run time.

4.Inline XML documentation comments.

5.What do you mean?Voice-integrated query (LINQ) that provides built-in query capabilities for a variety of data sources.

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The following are additional C# resources:

1.A good General introduction to the language.

2.What do you mean?Detailed information on certain aspects of the C# language can be found in the C# reference.

3.For more information about LINQ, see LINQ (Language-Integrated Query).

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