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

Working with types and attributes


Reflection is a programming feature that allows code to understand and manipulate itself. An assembly is made up of up to four parts:

  • Assembly metadata and manifest: Name, assembly and file version, referenced assemblies, and so on
  • Type metadata: Information about the types, their members, and so on
  • IL code: Implementation of methods, properties, constructors, and so on
  • Embedded Resources (optional): Images, strings, JavaScript, and so on

Metadata comprises of items of information about your code. Metadata is applied to your code using attributes. Attributes can be applied at multiple levels: to assemblies, to types, and to their members, as shown in the following code:

// an assembly-level attribute
[assembly: AssemblyTitle("Working with Reflection")]

[Serializable] // a type-level attribute
public class Person
// a member-level attribute
[Obsolete("Deprecated: use Run instead.")]
public void Walk()
   // ...

Versioning of assemblies

Version numbers in .NET...