C# Cookbook: Modern Recipes for Professional Developers

Description

Even if you're familiar with C# syntax, knowing how to combine various language features is a critical skill when you're building applications. This cookbook is packed full of recipes to help you solve issues for C# programming tasks you're likely to encounter. You'll learn tried-and-true techniques to help you achieve greater productivity and improve the quality of your code. Author and independent consultant Joe Mayo shares some of the most important practices you'll need to be successful as a C# developer. Each section of this cookbook describes some useful facet of the C# programming language. These recipes--the result of many years of experience--are proven concepts for solving real-world problems with C#. Recipes in this book will help you: • Set up your project, manage object lifetime, and establish patterns • Improve code quality through maintainability, error prevention, and correct syntax • Use LINQ to Objects for in-memory data manipulation and querying • Understand the differences between dynamic programming and reflection • Apply several async programming features you may not be aware of • Work with data using newer libraries and algorithms • Learn different ways to use new C# features, such as pattern matching and records Copyright Table of Contents Preface Why I Wrote This Book Who This Book Is For How This Book Is Organized Conventions Used in This Book Using Code Examples O’Reilly Online Learning How to Contact Us Acknowledgments Chapter 1. Constructing Types and Apps Establishing Architecture Applying Patterns Managing Object Lifetime 1.1 Managing Object End-of-Lifetime Problem Solution Discussion 1.2 Removing Explicit Dependencies Problem Solution Discussion See Also 1.3 Delegating Object Creation to a Class Problem Solution Discussion See Also 1.4 Delegating Object Creation to a Method Problem Solution Discussion See Also 1.5 Designing Application Layers Problem Solution Discussion 1.6 Returning Multiple Values from a Method Problem Solution Discussion 1.7 Converting from Legacy to Strongly Typed Classes Problem Solution Discussion 1.8 Making Classes Adapt to Your Interface Problem Solution Discussion 1.9 Designing a Custom Exception Problem Solution Discussion 1.10 Constructing Objects with Complex Configuration Problem Solution Discussion See Also Chapter 2. Coding Algorithms Performance Maintainability Mindset 2.1 Processing Strings Efficiently Problem Solution Discussion See Also 2.2 Simplifying Instance Cleanup Problem Solution Discussion See Also 2.3 Keeping Logic Local Problem Solution Discussion 2.4 Operating on Multiple Classes the Same Way Problem Solution Discussion See Also 2.5 Checking for Type Equality Problem Solution Discussion 2.6 Processing Data Hierarchies Problem Solution Discussion 2.7 Converting from/to Unix Time Problem Solution Discussion 2.8 Caching Frequently Requested Data Problem Solution Discussion See Also 2.9 Delaying Type Instantiation Problem Solution Discussion See Also 2.10 Parsing Data Files Problem Solution Discussion Chapter 3. Ensuring Quality 3.1 Writing a Unit Test Problem Solution Discussion See Also 3.2 Versioning Interfaces Safely Problem Solution Discussion 3.3 Simplifying Parameter Validation Problem Solution Discussion See Also 3.4 Protecting Code from NullReferenceException Problem Solution Discussion See Also 3.5 Avoiding Magic Strings Problem Solution Discussion 3.6 Customizing Class String Representation Problem Solution Discussion See Also 3.7 Rethrowing Exceptions Problem Solution Discussion See Also 3.8 Managing Process Status Problem Solution Discussion See Also 3.9 Building Resilient Network Connections Problem Solution Discussion 3.10 Measuring Performance Problem Solution Discussion See Also Chapter 4. Querying with LINQ 4.1 Transforming Object Shape Problem Solution Discussion 4.2 Joining Data Problem Solution Discussion See Also 4.3 Performing Left Joins Problem Solution Discussion 4.4 Grouping Data Problem Solution Discussion 4.5 Building Incremental Queries Problem Solution Discussion See Also 4.6 Querying Distinct Objects Problem Solution Discussion See Also 4.7 Simplifying Queries Problem Solution Discussion 4.8 Operating on Sets Problem Solution Discussion See Also 4.9 Building a Query Filter with Expression Trees Problem Solution Discussion See Also 4.10 Querying in Parallel Problem Solution Discussion See Also Chapter 5. Implementing Dynamic and Reflection 5.1 Reading Attributes with Reflection Problem Solution Discussion See Also 5.2 Accessing Type Members with Reflection Problem Solution Discussion See Also 5.3 Instantiating Type Members with Reflection Problem Solution Discussion See Also 5.4 Invoking Methods with Reflection Problem Solution Discussion See Also 5.5 Replacing Reflection with Dynamic Code Problem Solution Discussion See Also 5.6 Performing Interop with Office Apps Problem Solution Discussion See Also 5.7 Creating an Inherently Dynamic Type Problem Solution Discussion See Also 5.8 Adding and Removing Type Members Dynamically Problem Solution Discussion See Also 5.9 Calling Python Code from C# Problem Solution Discussion See Also 5.10 Calling C# Code from Python Problem Solution Discussion See Also Chapter 6. Programming Asynchronously 6.1 Creating Async Console Applications Problem Solution Discussion See Also 6.2 Reducing Memory Allocations for Async Return Values Problem Solution Discussion See Also 6.3 Creating Async Iterators Problem Solution Discussion See Also 6.4 Writing Safe Async Libraries Problem Solution Discussion See Also 6.5 Updating Progress Asynchronously Problem Solution Discussion See Also 6.6 Calling Synchronous Code from Async Code Problem Solution Discussion See Also 6.7 Waiting for Parallel Tasks to Complete Problem Solution Discussion See Also 6.8 Handling Parallel Tasks as They Complete Problem Solution Discussion See Also 6.9 Cancelling Async Operations Problem Solution Discussion See Also 6.10 Disposing of Async Resources Problem Solution Discussion See Also Chapter 7. Manipulating Data 7.1 Generating Password Hashes Problem Solution Discussion 7.2 Encrypting and Decrypting Secrets Problem Solution Discussion 7.3 Hiding Development Secrets Problem Solution Discussion 7.4 Producing JSON Problem Solution Discussion See Also 7.5 Consuming JSON Problem Solution Discussion See Also 7.6 Working with JSON Data Problem Solution Discussion See Also 7.7 Consuming XML Problem Solution Discussion See Also 7.8 Producing XML Problem Solution Discussion See Also 7.9 Encoding and Decoding URL Parameters Problem Solution Discussion 7.10 Flexible DateTime Reading Problem Solution Discussion See Also Chapter 8. Matching with Patterns 8.1 Converting Instances Safely Problem Solution Discussion 8.2 Catching Filtered Exceptions Problem Solution Discussion 8.3 Simplifying Switch Assignments Problem Solution Discussion 8.4 Switching on Property Values Problem Solution Discussion See Also 8.5 Switching on Tuples Problem Solution Discussion See Also 8.6 Switching on Position Problem Solution Discussion See Also 8.7 Switching on Value Ranges Problem Solution Discussion 8.8 Switching with Complex Conditions Problem Solution Discussion 8.9 Using Logical Conditions Problem Solution Discussion See Also 8.10 Switching on Type Problem Solution Discussion Chapter 9. Examining Recent C# Language Highlights 9.1 Simplifying Application Startup Problem Solution Discussion 9.2 Reducing Instantiation Syntax Problem Solution Discussion See Also 9.3 Initializing Immutable State Problem Solution Discussion See Also 9.4 Creating Immutable Types Problem Solution Discussion See Also 9.5 Simplifying Immutable Type Assignments Problem Solution Discussion See Also 9.6 Designing for Record Reuse Problem Solution Discussion 9.7 Returning Different Method Override Types Problem Solution Discussion See Also 9.8 Implementing Iterators as Extension Methods Problem Solution Discussion 9.9 Slicing Arrays Problem Solution Discussion See Also 9.10 Initializing Entire Modules Problem Solution Discussion See Also Summary Index About the Author