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

Writing and calling methods


Methods are type members that execute a block of statements.

A method that performs some actions, but does not return a value indicates this by showing that it returns the void type before the name of the method. A method that performs some actions and returns a value indicates this by showing that it returns the type of that value before the name of the method.

For example, you will create two methods:

  • WriteToConsole: This will perform an action (writing a line), but it will return nothing from the method, indicated by the void keyword
  • GetOrigin: This will return a string value, indicated by the string keyword

Inside the Person class, statically import System.Console, and then add the following code:

// methods 
public void WriteToConsole() 
{ 
   WriteLine($"{Name} was born on {DateOfBirth:dddd, d MMMM yyyy}"); 
} 
 
public string GetOrigin() 
{ 
   return $"{Name} was born on {HomePlanet}"; 
} 

Inside the Main method, add the following code:

p1.WriteToConsole(); 
WriteLine...