尝试使用 XmlNode.AppendChild-Methode ，非常好记录！

How do i insert an sub xml node dynamically in a xml file using c#?

What I have tried:

I have located the node to insert,
this is the below code:

xnlNodes = xelRoot.SelectNodes("/batchAnswer/document/answers")[docIndex].ChildNodes;

but want to know to insert the sub XML node?

Try to use XmlNode.AppendChild-Methode, is very good documented!