Inserting XML node at specific position

Question

I have an XML file and I am loading it in Xmldocument. This document has a node with some child nodes like this

Answer 1

you can use XLinq to modify XML document

Following is an example of xml modification

    String xmlString = ""+""+
    ""+
    "  "+
    " 1"+ //1
    " 2"+ //2
    " 3"+ // 3, I need to insert it
    " 4"+  //4,  I need to insert this second time
    " 5"+
    " 6"+ 
    "  "+
    " "+
    "";

    XElement root = XElement.Parse(xmlString);
    var childrens = root.Descendants("children").ToArray();
    var third = childrens[3];
    var fourth = childrens[4];
    third.AddBeforeSelf(new XElement("children"));
    fourth.AddBeforeSelf(new XElement("children"));

    var updatedchildren = root.Descendants("children").ToArray();