How to select all leaf nodes using XPath expression?

Question

I believe it\'s possible but couldn\'t figure out the syntax. Something like this:

xmlNode.SelectNodes(\"//*[count(child::*) <= 1]\")

bu

Answer 1

I'm adding this XSLT answer since it seems google's front matches lack such a solution:

After a long struggle with extracting CDATA as XML, eventually, this expression worked best for me: