Cacher is the code snippet organizer for pro developers

' For complete examples and data files, please go to https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-.NET
Using doc As DiagramDocument = Document.Load(Of DiagramDocument)(Utilities.MapSourceFilePath(FilePath))
    ' Add text watermark
    Dim textWatermark As New TextWatermark("Test watermark", New Font("Calibri", 19))
    doc.Pages(0).AddWatermark(textWatermark)

    ' Add image watermark
    Using imageWatermark As New ImageWatermark("D:\logo.jpg")
        doc.Pages(1).AddWatermark(imageWatermark)
    End Using
    doc.Save()
End Using