Book Image

The Modern C# Challenge

By : Rod Stephens
Book Image

The Modern C# Challenge

By: Rod Stephens

Overview of this book

C# is a multi-paradigm programming language. The Modern C# Challenge covers with aspects of the .NET Framework such as the Task Parallel Library (TPL) and CryptoAPI. It also encourages you to explore important programming trade-offs such as time versus space or simplicity. There may be many ways to solve a problem and there is often no single right way, but some solutions are definitely better than others. This book has combined these solutions to help you solve real-world problems with C#. In addition to describing programming trade-offs, The Modern C# Challenge will help you build a useful toolkit of techniques such as value caching, statistical analysis, and geometric algorithms. By the end of this book, you will have walked through challenges in C# and explored the .NET Framework in order to develop program logic for real-world applications.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Packt Upsell
Free Chapter
Dates and Times
Files and Directories
Advanced C# and .NET Features


The following sections describe solutions to the preceding problems. You can download the example solutions to see additional details and to experiment with the programs at

73. Directory size, LINQ style

Both this solution and Solution 65. Directory size, use the DirectoryInfo class's GetFiles method to make an array holding FileInfo objects that represent the files contained within the directory. The previous solution then used the following code to add the files' sizes:

// Add the file sizes.
long size = 0;
foreach (FileInfo fileinfo in fileinfos) size += fileinfo.Length;
return size;

This code loops through FileInfo objects and adds their file lengths to the size variable.

The new SizeLINQ extension method uses the following code to perform the same task:

// Add the file sizes.
var sizeQuery =
    from FileInfo fileinfo in fileinfos
    select fileinfo.Length;
return sizeQuery.Sum();

This version...