List or nested data is missing @context

[iJoris]

Describe the bug

When using an list of data, for example products it only adds an @context to the first entry.
The same problem occurs when using nested data, for example an location in an event.

This results in Google not detecting the items after the first one.

Steps to reproduce

1. Make an list of 2 or more events or products
2. Use SchemaSerializer.SerializeObject(obj)
3. See that the second item is missing @context

Expected behaviour

Every item as an @context

Schema objects

Tested it with product, and music event.

[Turnerj]

That is currently intentional with what we are doing here: https://github.com/RehanSaeed/Schema.NET/blob/main/Source/Common/SchemaSerializer.cs#L79-L90

To be honest, I don't remember exactly why we do this but I'm not personally opposed to changing it if we are doing something wrong.

[RehanSaeed]

Its been a while and I don't remember why we did this either. It would be good if we could refer to the spec on this and get proof of the correct implementation.