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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, Dustin Heffron, Efraim Kyriakidis
4.1 (16)
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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

4.1 (16)
By: Mark J. Price, Dustin Heffron, Efraim Kyriakidis

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)
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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
1
Index

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 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:

2147483646
2147483647
-2147483648
-2147483647

Now, let's get the compiler to warn...

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