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: The C# Type System
: Steve Love
: No Starch Press
: 2024
: 312
:
: pdf, epub (true), mobi
: 10.2 MB

Harness the power of the C# type system to write programs that are clearer, simpler, and more efficient.

The type system is the foundation upon which all C# programs are built. The C# Type System will show you how todefine and implement value types effectively, and write more performant and robust code. Real-world code examplesand test cases throughout will elevate your programming with C# and show you how best to implement the principlesyoure learning.

According to the C# Language Specification, C# is intended to be a simple, modern, general-purpose, object-oriented programming language. C# may look simple on the surface, but it has hidden depths even in its most fundamental features. The type system is a central element of C# and is the foundation upon which all C# programs are built. This has been true from the earliest versions of C#, and will continue to be relevant as the language evolves. The C# Type System isnt a gallery of the latest language features, and we wont delve into every detail of the latest edition, because C# is constantly advancing; instead well focus on the languages rich support for creating your own types and examine how best to employ the type system to improve your designs and write clearer, simpler, more efficient programs.

Many languages allow users to define their own types, but C# is different in that it makes a clear distinction between classes, which are reference types, and value types. Classes are the default choice for implementing a design in C# and the general-purpose mechanism for custom types, as they support all the object-oriented features that C# has to offer. In contrast, value types are much more specialized, which is why theyre often misunderstood and dismissed as an advanced feature thats irrelevant for most applications. Its true that value types arent suitable for many custom types in an application, and they may not be necessary in every design, but they have several advantages that are frequently underappreciated.

Among the core aspects of working with the type system, youll learn

How user-defined value types, and even simple types, can enhance your codes readability
How reference and value types differ within C#
How method parameters and arguments relate to reference and value types
How differences in copy semantics between value and reference types affect a programs behavior
How the different methods of value comparisons for equality work behind the scenes
The unique characteristics and roles of various types in an application, especially how value types go beyond meredata storage
Why inheritance isnt optimal for value types
How to measure and evaluate the performance of an apps use of different data types

Whether youre a novice or seasoned programmer, youll find The C# Type System indispensable in your efforts to turngood code into great.

The C# Type System












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