Sorting child nodes of a treeview after populating the treeview in c# winforms

Question

I am having trouble sorting child nodes of a treeview in my winforms program. My treeview is populated by some XML files and it uses an internal text inside the xml files as

Answer 1

You're using alphabetic sorting, so D10 comes after D1.
You should try to sort discarding "D" char and converting the rest of string to a number.