Improve Selection performance
Brought to you by:
davideicardi
What I changed is way of merging
RangeRegions - if you are sure that region you are
adding have no intersection with actual region,
you can omit some checks and increase performance.
See BOL comments.
Thanks to bladeblade for this code.
See also:
http://www.devage.com/Forum/ViewTopic.aspx?id=293d9cd8323a4251a9c5eecc59a5f0cf
See attach
Selection Fix