https://learn.microsoft.com/en-us/dotnet/api/system.data.sqlclient.sqlbulkcopy.sqlrowscopied?view=netframework-4.8.1
SqlBulkCopy.SqlRowsCopied Event (System.Data.SqlClient) | Microsoft Learn
Occurs every time that the number of rows specified by the NotifyAfter property have been processed.
event systemdatamicrosoftlearn
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