When a document has a list in it and the element containing it is cloned into another document, there is a key not found exception if you try to export the second document.
RadFlowDocument document = new RadFlowDocument(); if (tableDocument.Sections.First().Blocks.First() is Table workSheetTable) { Table clonedTable = workSheetTable.Clone(document); var newSection = document.Sections.AddSection(); newSection.Blocks.Add(clonedTable); } byte[] pdfBytes = pdfProvider.Export(document); byte[] docBytes = docxProvider.Export(document);