GroupDocs.Merger.Legacy Namespaces
The GroupDocs.Merger.Legacy namespace provides classes for working with legacy document handler.
The GroupDocs.Merger.Legacy.Domain namespace provides common classes to operate with legacy document handler.
The GroupDocs.Merger.Legacy.Handler namespace provides classes which allow you to merge documents with legacy document handler and manipulate document structure (split single document to multiple documents, reorder or replace document pages, change page orientation, manage document password and perform other manipulations) across wide range of supported document types - PDF, DOCX/DOC, PPTX/PPT, XLSX/XLS, VSDX/VSD, ODT, ODS, ODP, HTML, EPUB and many others.

The DocumentHandler is the entry point for merging process.