https://www.spreadsheetgear.com/support/help/spreadsheetgear.net.9.0/SpreadsheetGear2023~SpreadsheetGear.IBuiltinDocumentProperties~InitializeDefaults.html
InitializeDefaults Method (IBuiltinDocumentProperties)
Clears all built-in properties and then sets IBuiltinDocumentProperties.Author to the value of IWorkbookSet.UserName and sets...
method