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

Controlling access with properties and indexers


Earlier, you created a method named GetOrigin that returned a string containing the name and origin of the person. Languages such as Java do this a lot. C# has a better way: properties.

A property is simply a method (or a pair of methods) that acts and looks like a field when you want to get or set a value, thereby simplifying the syntax.

Defining read-only properties

In the Person2.cs file, inside the Person class, add the following code to define three properties:

  • The first property will perform the same role as the GetOrigin method using the property syntax that works with all versions of C# (although, it uses the C# 6 and later string interpolation syntax)
  • The second property will return a greeting message using the C# 6 and later, the lambda expression (=>) syntax
  • The third property will calculate the person's age

Here is the code:

// property defined using C# 1 - 5 syntax 
public string Origin 
{ 
   get 
   { 
      return $"{Name} was born...