Search metadata properties of a document | https://docs.conholdate.com/net/search-metadata-properties/

search-metadata.cs

// Constants.InputPptx is an absolute or relative path to your document. Ex: @"C:\Docs\source.pptx"
using (Metadata metadata = new Metadata(Constants.InputPptx))
{
	// Fetch all the properties satisfying the predicate:
	// property contains the name of the last document editor OR the date/time the document was last modified
	var properties = metadata.FindProperties(p => p.Tags.Contains(Tags.Person.Editor) || p.Tags.Contains(Tags.Time.Modified));

	foreach (var property in properties)
	{
		Console.WriteLine("Property name: {0}, Property value: {1}", property.Name, property.Value);
	}
}

Read the complete article: https://docs.conholdate.com/net/search-metadata-properties/