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// For complete examples and data files, please go to https://github.com/groupdocsviewer/GroupDocs_Viewer_NET
//Initialize the ReorderPageOptions object by passing guid as document name, current Page Number, new page number
ReorderPageOptions options = new ReorderPageOptions(guid, currentPageNumber, newPageNumber);
// call ViewerHandler's Reorder page function by passing initialized ReorderPageOptions object.
Handler.ReorderPage(options);