GroupDocs.Watermark for .NET
GroupDocs.Watermark for .NET enables you to build applications which let your end-users add new watermarks and search for and remove existing watermarks in supported file formats. Using GroupDocs.Watermark for .NET, you can programmatically apply digital watermarks to multitude of file formats and discourage unauthorized use of intellectual property and securely label documents of sensitive nature by employing various built-in security measures offered by this API.