Currently Dictionary<TKey, TValue> is serialized as one of two forms:

1. A document where the element names are the dictionary key values (only possible when TKey is string)
2. An array of nested two-element arrays containing key value pairs

The second representation is perfectly adequate for serialization/deserialization, but it is difficult to query against. To better support querying the following alternate representation is proposed:

{ 'dictionary' : [

, ...] }

This representation uses a nested document for the key/value pairs instead of a nested two-element array. This facilitates querying against either the keys or the values.

There should also be a serialization option to allow the developer to choose the second representation even when TKey is string.