Book Image

C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development - Third Edition

By : Mark J. Price
Book Image

C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development - Third Edition

By: Mark J. Price

Overview of this book

C# 7.1 and .NET Core 2.0 – Modern Cross-Platform Development, Third Edition, is a practical guide to creating powerful cross-platform applications with C# 7.1 and .NET Core 2.0. It gives readers of any experience level a solid foundation in C# and .NET. The first part of the book runs you through the basics of C#, as well as debugging functions and object-oriented programming, before taking a quick tour through the latest features of C# 7.1 such as default literals, tuples, inferred tuple names, pattern matching, out variables, and more. After quickly taking you through C# and how .NET works, this book dives into the .NET Standard 2.0 class libraries, covering topics such as packaging and deploying your own libraries, and using common libraries for working with collections, performance, monitoring, serialization, files, databases, and encryption. The final section of the book demonstrates the major types of application that you can build and deploy cross-device and cross-platform. In this section, you'll learn about websites, web applications, web services, Universal Windows Platform (UWP) apps, and mobile apps. By the end of the book, you'll be armed with all the knowledge you need to build modern, cross-platform applications using C# and .NET.
Table of Contents (31 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
2
Part 1 – C# 7.1
8
Part 2 – .NET Core 2.0 and .NET Standard 2.0
16
Part 3 – App Models
22
Summary
Index

Inheriting from classes


The Person type we created earlier is implicitly derived (inherited) from System.Object. Now, we will create a new class that inherits from Person.

Add a new class named Employee.cs to the PacktLibrary project.

Modify its code as shown in the following code:

using System; 
 
namespace Packt.CS7 
{ 
   public class Employee : Person 
   { 
   } 
}

Add statements to the Main method to create an instance of the Employee class:

Employee e1 = new Employee  
{ 
   Name = "John Jones",  
   DateOfBirth = new DateTime(1990, 7, 28)  
};
e1.WriteToConsole(); 

Run the console application and view the output:

John Jones was born on Saturday, 28 July 1990

Note that the Employee class has inherited all the members of Person.

Extending classes

Now, we will add some employee-specific members to extend the class.

In the Employee class, add the following code to define two properties:

public string EmployeeCode { get; set; } 
public DateTime HireDate { get; set; } 

Back in the Main method, add...