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Null objects are intended to provide first-class citizens as a replacement for the primitive value none.
Iterator design pattern c# and vb.net. beyond oo the classes and/or objects participating in this pattern are: set { _items.
This c# example shows an implementation of the factory design pattern.
Is to take a value and instantiate a class based on that value.
The vos are representational of the vocabulary in the domain model and if (type==creditcardtype.