C# Regex - Split and Keep Splitter

Related:
http://stackoverflow.com/a/2910549/194031

I have a string like:

"abc defgh <!inc(C:\my files\abc.txt)!>kdi kdkd<!inc(C:\my files\abc.txt)!>"
 

and I want to get:

["abc defgh ", "C:\my files\abc.txt", "kdi kdkd", "C:\my files\abc.txt"]
 

Also, I don't want

"abc <!inc(C:\my files\abc.txt adf" (missing end bracket) 
 

to get split.

Based on the related question and other similar answers, I need to use look aheads, but I can't figure out how to use them while accomplishing removing the tags and not splitting if part of the tags are missing.

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