[GitHub] [arrow] DanTm99 commented on issue #34076: [C#] Exception thrown when creating schema with multiple columns with the same name

["DanTm99 (via GitHub)" <gi...@apache.org>]

DanTm99 commented on issue #34076:
URL: https://github.com/apache/arrow/issues/34076#issuecomment-1423966649

   This exception is thrown when constructing the `_fieldsDictionary`, because the keys for it are the field names and a dictionary cannot have multiple entries with the same key.
   
   This is publicly exposed as `IReadOnlyDictionary<string, Field> Fields`, and avoiding this exception would require either skipping fields with duplicate names when constructing it (making the dictionary an inaccurate representation of the schema), or by replacing the `IReadOnlyDictionary<string, Field>` with another type (e.g. `ILookup<string, Field>` or `IReadOnlyList<Field>`) which would be a breaking change for anyone using `Fields` directly.
   
   @westonpace @eerhardt thoughts?


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