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

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...