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Associative Arrays

An associative array is an array which allows indexing by means of arbitrary objects, not just integers

An associative arrays maps a set of objects (the indexing objects, keys) to another set of objects (the element objects).
The class A indexed by a string.
A client of A which uses the string indexing of A.
Output from Main in class B.
Associative arrays are in C# implemented by means of hashtables in dictionaries