How can I parse the childs of a XMLNodeList?

Hi team!

How can I parse the childs of a XMLNodeList?.
For example now I’m working with a child that I Know. The The root is: cfdi:Conceptos and its child is: cfdi:Concepto

But I need to know how much childs have cfdi:Conceptos, in order to invoke it.

Thats how I accessing to cfdi:Concepto:

Dim nodes As XmlNodeList
nodes = xml.Xql("//cfdi:Conceptos/cfdi:Concepto")

Dim node As XmlNode

For i As Integer = 0 To nodes.Length-1
Msgbox node.GetAttribute(“unidad”)


Any Ideas?, Regards

nodes.child(0).count and then iterate through them