Book Image

C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition

Book Image

C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition

Overview of this book

If you want to build powerful cross-platform applications with C# 7 and .NET Core, then this book is for you. First, we’ll run you through the basics of C#, as well as object-oriented programming, before taking a quick tour through the latest features of C# 7 such as tuples, pattern matching, out variables, and so on. After quickly taking you through C# and how .NET works, we’ll dive into the .NET Standard 1.6 class libraries, covering topics such as performance, monitoring, debugging, serialization and encryption. The final section will demonstrate the major types of application that you can build and deploy cross-device and cross-platform. In this section, we’ll cover Universal Windows Platform (UWP) apps, web applications, mobile apps, and web services. Lastly, we’ll look at how you can package and deploy your applications so that they can be hosted on all of today’s most popular platforms, including Linux and Docker. 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 Core.
Table of Contents (24 chapters)
C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Checking for overflow


Earlier, we saw that when casting between number types, it was possible to lose information, for example, when casting from a long variable to an int variable. If the value stored in a type is too big, it will overflow.

Add a new console application project named Ch03_CheckingForOverflow.

The checked statement

The checked statement tells .NET to throw an exception when an overflow happens instead of allowing it to happen silently.

We set the initial value of an int variable to its maximum value minus one. Then, we increment it several times, outputting its value each time. Note that once it gets above its maximum value, it overflows to its minimum value and continues incrementing from there.

Type the following code in the Main method and run the program:

    int x = int.MaxValue - 1; 
    WriteLine(x); 
    x++; 
    WriteLine(x); 
    x++; 
    WriteLine(x); 
    x++; 
    WriteLine(x); 

Run the console application and view the output...