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// For complete examples and data files, please go to https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-.NET
//Get Configurations
ViewerConfig config = Utilities.GetConfigurations();

// Create html handler
ViewerHtmlHandler htmlHandler = new ViewerHtmlHandler(config);

// Guid implies that unique document name 
string guid = DocumentName;

// Set CAD options to get the full list of Layouts
DocumentInfoOptions documentInfoOptions = new DocumentInfoOptions();
documentInfoOptions.CadOptions.RenderLayouts = true;

// Get DocumentInfoContainer and iterate through pages 
DocumentInfoContainer documentInfoContainer = htmlHandler.GetDocumentInfo(guid, documentInfoOptions);
foreach (PageData page in documentInfoContainer.Pages)
{
    Console.WriteLine("Page number: {0} - {1}", page.Number, page.Name);
}