Clone ParagraphProperties in Word using OpenXml SDK 2.0

Question

I am programmly generating new paragraphs in Word document via Open XML SDK 2.0. A have first paragraphs with properties, that i would like to append to all new generated paragraphs. Somthing like this: ``` var _texts = new List() { "Text 1", "Text 2", "Text 1", "Text 4"}; var sdtBlock = wordDoc.MainDocumentPart.RootElement.Descendants().First(); foreach (string _t in _texts) { Paragraph p = new Paragraph(); p.Append(sdtBlock.ParagraphProperties); p.Append(new Run(new Text(_t))); sdtBlock.InsertAfterSelf(p); } ``` Executing this code throws an Exception: "Cannot insert the OpenXmlElement "newChild" because it is part of a tree." Any ideas?

Accepted Answer

You need to use the `CloneNode()` method to make a copy of the instance of `ParagraphProperties` that you want to add to your new paragraph, e.g.

```
p.Append(sdtBlock.ParagraphProperties.CloneNode(true));
```

Otherwise, you'll get the exception you described (because you would be adding the original node in two different places in the same document, which is not allowed - and not what you were intending to do).

Clone ParagraphProperties in Word using OpenXml SDK 2.0

Solution

Problem