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// For complete examples and data files, please go to https://github.com/groupdocsmetadata/GroupDocs_Metadata_NET
// initialize PptFormat
PptFormat pptFormat = new PptFormat(Common.MapSourceFilePath(filePath));

// clean metadata
pptFormat.CleanMetadata();

// save output file...
pptFormat.Save(Common.MapDestinationFilePath(filePath));