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
Copyright
About Packt
Contributors
Preface
16
Designing Guidelines for .NET Core Application Performance
Index

Sharing code cross-platform with .NET Standard 2.0 class libraries


Before .NET Standard 2.0, there was Portable Class Libraries (PCL). With PCLs, you can create a library of code and explicitly specify which platforms you want the library to support, such as Xamarin, Silverlight, and Windows 8. Your library can then use the intersection of APIs that are supported by the specified platforms.

Microsoft realized that this is unsustainable, so they have been working on .NET Standard 2.0—a single API that all future .NET platforms will support. There are older versions of .NET Standard, but they are not supported by multiple .NET platforms.

.NET Standard 2.0 is similar to HTML5 in that they are both standards that a platform should support. Just as Google's Chrome browser and Microsoft's Edge browser implement HTML5 standard, so .NET Core and Xamarin implement .NET Standard 2.0.

If you want to create a library of types that will work across .NET Framework (on Windows), .NET Core (on Windows, macOS...