Page 21 - CSharp/C#

Extension methods dispatch based on static type 358
Extension methods aren't supported by dynamic code. 360

Extension methods as strongly typed wrappers 361

Extension methods for chaining 361

Extension methods in combination with interfaces 362

IList Extension Method Example: Comparing 2 Lists 362

Extension methods with Enumeration 363

Extensions and interfaces together enable DRY code and mixin-like functionality 365

Extension methods for handling special cases 365

Using Extension methods with Static methods and Callbacks 366

Extension methods on Interfaces 368

Using Extension methods to create beautiful mapper classes 368

Using Extension methods to build new collection types (e.g. DictList) 369

Chapter 57: File and Stream I/O 371

Introduction 371

Syntax 371

Parameters 371

Remarks 371

Examples 372

Reading from a file using the System.IO.File class 372

Writing lines to a file using the System.IO.StreamWriter class 372

Writing to a file using the System.IO.File class 372
Lazily reading a file line-by-line via an IEnumerable 373

Create File 373

Copy File 374

Move File 374

Delete File 375

Files and Directories 375

Async write text to a file using StreamWriter 375

Chapter 58: FileSystemWatcher 376

Syntax 376

Parameters 376