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

Here is a solution without using LINQ to XML. It's implemented as an extension method for the XmlNode class:

public static void InsertAt(this XmlNode node, XmlNode insertingNode, int index = 0)
{
    if(insertingNode == null)
        return;
    if (index < 0)
        index = 0;

    var childNodes = node.ChildNodes;
    var childrenCount = childNodes.Count;

    if (index >= childrenCount)
    {
        node.AppendChild(insertingNode);
        return;
    }

    var followingNode = childNodes[index];

    node.InsertBefore(insertingNode, followingNode);
}

Now, you can insert a node at the desired position as simple as:

    parentXmlNode.InsertAt(childXmlNode, 7);