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' For complete examples and data files, please go to https://github.com/groupdocsmetadata/GroupDocs_Metadata_NET
' initialize DocFormat
Dim docFormat As New DocFormat(Common.MapSourceFilePath(filePath))

' initialize DocMetadata
Dim docMetadata As DocMetadata = docFormat.DocumentProperties

'update document property...
docMetadata.Author = "Usman"
docMetadata.Company = "Aspose"
docMetadata.Manager = "Usman Aziz"

'save output file...
docFormat.Save(Common.MapDestinationFilePath(filePath))