Book Image

C# 7 and .NET: Designing Modern Cross-platform Applications

By : Mark J. Price, Ovais Mehboob Ahmed Khan
Book Image

C# 7 and .NET: Designing Modern Cross-platform Applications

By: Mark J. Price, Ovais Mehboob Ahmed Khan

Overview of this book

C# is a widely used programming language, thanks to its easy learning curve, versatility, and support for modern paradigms. The language is used to create desktop apps, background services, web apps, and mobile apps. .NET Core is open source and compatible with Mac OS and Linux. There is no limit to what you can achieve with C# and .NET Core. This Learning Path begins with the basics of C# and object-oriented programming (OOP) and explores features of C#, such as tuples, pattern matching, and out variables. You will understand.NET Standard 2.0 class libraries and ASP.NET Core 2.0, and create professional websites, services, and applications. You will become familiar with mobile app development using Xamarin.Forms and learn to develop high-performing applications by writing optimized code with various profiling techniques. By the end of C# 7 and .NET: Designing Modern Cross-platform Applications, you will have all the knowledge required to build modern, cross-platform apps using C# and .NET. This Learning Path includes content from the following Packt products: • C# 7.1 and .NET Core 2.0 - Modern Cross-Platform Development - Third Edition by Mark J. Price • C# 7 and .NET Core 2.0 High Performance by Ovais Mehboob Ahmed Khan
Table of Contents (25 chapters)
Title Page
About Packt
Designing Guidelines for .NET Core Application Performance

.NET Core internals

.NET Core contains two core components—the runtime CoreCLR and the base-class libraries CoreFX. In this section, we will cover the following topics:

  • CoreFX
  • CoreCLR
  • Understanding MSIL, CLI, CTS, and CLS
  • How CLR works
  • From compilation to execution—under the hood
  • Garbage collection
  • .NET Native and JIT compilation


CoreFX is the code name of .NET Core's set of libraries. It contains all the libraries that start with Microsoft.* or System.*and contains collections, I/O, string manipulation, reflection, security, and many more features.

The CoreFX is runtime agnostic, and it can run on any platform regardless of what APIs it supports.


To learn more about each assembly, you can refer to the .NET Core source browser at


CoreCLR provides the common language runtime environment for .NET Core applications, and manages the execution of the complete application life cycle. It performs various operations when the program is running. Operations such as memory...