https://learn.microsoft.com/en-us/dotnet/api/system.collections.concurrent.orderablepartitioner-1?view=netframework-4.8.1&viewFallbackFrom=net-8.0
OrderablePartitionerTSource Class (System.Collections.Concurrent) | Microsoft Learn
Represents a particular manner of splitting an orderable data source into multiple partitions.
class systemcollectionsconcurrentmicrosoftlearn