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Source Code

The ObjectInitializers project can be found under the Chapter 13 subdirectory.

Understanding Anonymous Types

As an OO programmer, you know the benefits of defining classes to represent the state and func-

tionality of a given programming entity. To be sure, whenever you need to define a class that is

intended to be reused across projects and provides numerous bits of functionality through a set of

methods, events, properties, and custom constructors, creating a new C# class is common practice

and often mandatory.

However, there are other times in programming when you would like to define a class simply to

model a set of encapsulated (and somehow related) data points without any associated methods,

events, or other custom functionality. Furthermore, what if this type is only used internally to your

current application and it’s not intended to be reused? If you need such a “temporary” type, earlier

versions of C# would require you to nevertheless build a new class definition by hand:

internal class SomeClass

{

// Define a set of private member variables...

// Make a property for each member variable...

// Override ToString() to account for each member variable...

// Override GetHashCode() and Equals() to work with value based equality...

}

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