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// For complete examples and data files, please go to https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-.NET
//Initialize the ReorderPageOptions object by passing current page number, new page number.
ReorderPageOptions options = new ReorderPageOptions(currentPageNumber, newPageNumber);
// call ViewerHandler's Reorder page function by passing guid and initialized ReorderPageOptions object.
Handler.ReorderPage(guid, options);