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C# 6 and .NET Core 1.0

C# 6 and .NET Core 1.0

3.8 (11)
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C# 6 and .NET Core 1.0

C# 6 and .NET Core 1.0

3.8 (11)

Overview of this book

With the release of .NET Core 1.0, you can now create applications for Mac OS X and Linux, as well as Windows, using the development tools you know and love. C# 6 and .NET Core 1.0 has been divided into three high-impact sections to help start putting these new features to work. First, we'll run you through the basics of C#, as well as object-orient programming, before taking a quick tour through the latest features of C# 6 such as string interpolation for easier variable value output, exception filtering, and how to perform static class imports. We'll also cover both the full-feature, mature .NET Framework and the new, cross-platform .NET Core. After quickly taking you through C# and how .NET works, we'll dive into the internals of the .NET class libraries, covering topics such as performance, monitoring, debugging, internationalization, serialization, and encryption. We'll look at Entity Framework Core 1.0 and how to develop Code-First entity data models, as well as how to use LINQ to query and manipulate that data. The final section will demonstrate the major types of applications that you can build and deploy cross-device and cross-platform. In this section, we'll cover Universal Windows Platform (UWP) apps, web applications, and web services. Lastly, we'll help you build a complete application that 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 (20 chapters)
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19
Index

Creating your own LINQ extension methods


In Chapter 7, Implementing Interfaces and Inheriting Classes, you learned how to create your own extension methods. To create LINQ extension methods, all you have to do is extend the IEnumerable<T> type.

Add a new Class Library project named Ch09_MyLINQExtensions. Rename the Class1.cs file to MyLINQExtensions.

Modify the class to look like the following code. Note that the ProcessSequence extension method doesn't actually modify the sequence because it exists only as an example. It would be up to you to process the sequence in whatever manner you want. The SummariseSequence extension method also doesn't do anything especially useful. It simply returns the number of items in the sequence by using the built-in LongCount extension method. Again, it would be up to you to decide exactly what this method should do and what type it should return:

using System.Collections.Generic;

namespace System.Linq
{
    public static class MyLINQExtensions
    {...
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