' For complete examples and data files, please go to https://github.com/groupdocsmetadata/GroupDocs_Metadata_NET
' initialize PptFormat
Dim pptFormat As New PptFormat(Common.MapSourceFilePath(filePath))
' initialize PptMetadata
Dim metadata As PptMetadata = pptFormat.DocumentProperties
Dim propertyName As String = "New custom property"
' check if property is not built-in
If Not metadata.IsBuiltIn(propertyName) Then
' remove property
metadata.Remove(propertyName)
Else
Console.WriteLine("Can not remove built-in property.")
End If
' save file in destination folder
pptFormat.Save(Common.MapDestinationFilePath(filePath))