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

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

By : Mark J. Price
3.7 (37)
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C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development

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

3.7 (37)
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 (23 chapters)
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22
Index

Casting within inheritance hierarchies

Casting between types is subtly different from converting between types. Casting is between similar types, like between a 16-bit integer and a 32-bit integer, or between a superclass and one of its subclasses. Converting is between dissimilar types, like between text and a number.

Implicit casting

In the previous example, you saw how an instance of a derived type can be stored in a variable of its base type (or its base's base type, and so on). When we do this, it is called implicit casting.

Explicit casting

Going the other way is an explicit cast, and you must use parentheses around the type you want to cast into as a prefix to do it:

  1. In the Main method, add a statement to assign the aliceInPerson variable to a new Employee variable, as shown in the following code:
    Employee explicitAlice = aliceInPerson;
    
  2. Visual Studio Code displays a red squiggle and a compile error, as shown in the following...
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C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development
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