ASP.NET Core 1.1 Web API for Beginners
11
1. Introduction
Introduction
Let’s start by describing what ASP.NET Core is before you create your first Web API applica-
tion.
What Is ASP.NET Core?
ASP.NET Core is an open-source, cross-platform framework for building cloud-based,
internet-connected solutions. It can be web apps and Web APIs for those apps as well as
for mobile apps. You can find the ASP.NET Core code at https://github.com/aspnet.
Because it is cross-platform enabled, you can develop on and run your applications on
Windows, Linux, and Mac operating systems. The latter two require you to use ASP.NET
Core and Entity Framework Core; you can’t use older versions of Entity Framework or
ASP.NET since they require Windows to work.
You can use any version of Visual Studio 2017, Visual Studio Code, or any other editor of
your choice. The examples in this book are created using Visual Studio 2017 and Windows
10.
ASP.NET Core is not an update from the previous version of ASP.NET; it was rewritten from
the ground up to make it more granular and flexible, using NuGet packages to install only
the functionality you need. Some benefits to this approach are: smaller application surface
area, tighter security, and improved performance.
What Is the .NET Core Framework?
The .NET Core framework is a modular and portable cross-platform framework that is
designed for code sharing and reuse. It’s a sub-set of the full .NET Framework that can be
used regardless of the platform you target, which means that you only have to write and
maintain one version of your code.
You can use .NET Core with web applications on Windows, Linux and Mac, Windows
desktop applications, Windows devices, and phone apps, and in the future, you will be
able to use it with Xamarin.
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