To take advantage of all the knowledge that will be shared in this book, it is important that you have access to a computer, with administrative privileges, and also access to the internet.

Other necessary software will be shared in this chapter and the rest of the book where necessary.

You can find all code examples and other materials used in this book in the following repository: https://github.com/PacktPublishing/ASP.NET-Core-9.0-Essentials.

ASP.NET core is a platform that has existed since 2016 and has been constantly improved, allowing the development of high-performance, modern, and cloud-ready solutions.

A few years ago, it was only possible to develop solutions on the .NET platform using the Windows operating system. However, with the great market demand and the rapid evolution of technologies, Microsoft began a one-way process of restructuring and redesigning the platform, adopting the open source model, which gave the developer community the opportunity to adopt a robust development model, independent of the operating system.

The last major version of ASP.NET to run exclusively on the Windows operating system was 4.x, and after the redesign, the platform was renamed ASP.NET Core, which is currently in version 9 STS(Standard Term Support).

Recently, ASP.NET Core 9 has become an extremely rich platform, enabling the delivery of solutions for different types of purposes and, what’...

Both .NET and .NET Framework (usually called Full Framework) have similarities – that is, they are platforms that allow us to deliver great solutions.

In general, the platform is a framework with a set of features that allows us to develop different types of applications. In February 2002, .NET Framework brought a new development model using a centralized platform, allowing us to develop applications for Windows and the web through technologies such as Windows Forms, ASP.NET Web Forms, ASP.NET MVC, as well as console applications, among some other extensions.

Since the first versions, it was already possible to develop applications in different languages such as C#, Visual Basic, and any other languages that implemented the .NET Framework specifications. However, it depended on the Windows operating system and its system APIs.

The evolution and redesign of the .NET Core platform has brought many benefits to the Microsoft ecosystem,...

The .NET platform has a set of tools available to offer the best experience to developers, regardless of the operating system used.

ASP.NET Core 9 applications can be developed and run on Windows, Linux, and macOS operating systems.

Code snippets will be presented throughout the book in order to demonstrate the concepts of ASP.NET Core 9 through practical examples. All supporting material for the book can be found in the GitHub repository, the link to which can be found in the Technical requirements section.

In this section, we will configure our environment on the three operating systems and create our first ASP.NET Core 9 project, but first, let’s see what things we will require to get started.

The development tool

We can develop ASP.NET Core 9 applications using any text editor and then compile the developed code using the SDK(Software Development Kit), which will be discussed in the next section.

Microsoft offers two...

As it is open source and independent of any operating system, the .NET platform has received several improvements in recent years, further improving the experience of developers and bringing several new features constantly requested by the community and, in addition, several improvements in performance and bug fixes.

Some improvements are as follows:

• Native AOT: This option was introduced in version 7.0 of the framework to create a self-contained application, in a single file, adding support for the x64 processors and ARM64 architectures of macOS and greatly reducing the size of the file, reaching up to 50% reduction in Linux environments.
• Improvements in serialization libraries: Applications constantly interact with data in JSON and the System.Text.Json API, native to .NET, has been constantly revised and improved, avoiding dependence on third-party libraries and considerably improving its performance and support.
• Performance: There...

In this chapter, we learned about the .NET platform and ASP.NET Core 9, available in the main operating systems. We learned the differences between the .NET and .NET Framework, in addition to learning about the process of updating the framework versions and the difference between the STS and LTS versions. We also configured our development environment on different operating systems and developed an ASP.NET MVC application, validating the entire working environment .

In Chapter 2, we’ll use our already configured environment to learn the different approaches and options available to develop UIs in ASP.NET Core 9.