KeyValuePairType
This type is a generic container for arbitrary information. Key/value pairs are supported to transport non-typed generic information which has not currently been defined in API data structures.

The following attributes are defined:
- Key
Name of the property
The value is included directly in the body of the element.
Query Parameter Representation
A KeyValuePair can be represented in query strings as follows:
<Key> + "," + <Value>