how to bind listbox to xml in hierarchy manner

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C#

ASP.NET

XML

hi,

i have an xml file in which suppose it has one data name in this hierarchy

1)car( main item)

a)power

max power
min power

b) speed

max speed
min speed

c)tank capacity

similarly i have another item name cycle. with same hierarchy key

in my gui there are three things one is

combo box and two list box

combo box is bind to main item that is car and cycle , if user select car(combo box) then allfeatres of car should display in listbox simlarly if selct item from this listbox then in another list box max power and min power should display. and if 2nd item of combobox is selected then the previous value in the listbox should be clear and new related value should
appear.