* [csharp] Support composition on toJson
Previous implementation assumed specification only supports polymorphic
associations (via discrimator), although the code didn't seem to be
setup correctly for that in the first place. That is, the parent object
must define the discriminator (see
https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#models-with-polymorphism-support),
so NOT HAS parent AND HAS discriminator doesn't make sense.
From a C# perspective, base classes should have the method marked
virtual and derived classes should override the method. This supports
both composition and polymorphic definitions.
* [csharp] this.Configuration in api template
Unprefixed Configuration property access leads to ambiguous references
when spec defines a Configuration model.
* [csharp] Models/properties support nested arrays
Previous implementation didn't support multiple levels of array with
array items as OpenAPI spec supports. This means an object defined as
type: array with items = type: array|items=double (which is common in
GIS) would not be possible.
This implementation assumes generics in the nested type definitions, so
the above would generate List<List<double?>> for model parent types as
well as property type declarations.
* [csharp] Regenerate integration test sample
* [csharp] Set "Client" case sensitive as reserved
* [csharp] Regenerate security sample
* [csharp] Regenerate samples
