[C#] Add Support for Dictionary Arrays and Dictionary Encoding #23198
Description
The C# implementaiton of Arrow doesn't support dictionary arrays, serialization/deserialization of dictionary batches, or dictionary encoding.
Dictionary arrays and dictionary encoding could provide a huge performance benefit for certain data sets.
I propose creating dictionary array types that correspond to the existing array types
Reporter: Daniel Parubotchy
PRs and other links:
Note: This issue was originally created as ARROW-6870. Please see the migration documentation for further details.