dtSearch .NET Standard API 2023.02
IndexJob.DataSourceList Property

DataSources to index for multithreaded indexing (one DataSource object must be provided for each thread). 

When using the multithreaded DataSource API, the indexer will index all documents returned from GetNextDoc even if they have not changed since the last time they were indexed, so to prevent redundant indexing, the indexing application should only return new or modified documents from the DataSource.

public List<DataSource> DataSourceList;