Hi Steve,
I am afraid that implementing different styles for the first and for the last RadComboBox item is not officially supported.
However there is one approach that you can try.
You can handle the
OnClientDropDownOpening event and add specific styling to the first and to the last RadComboBox items in this way:
Please note that in such scenario most probably you will have to implement a custom skin.
Kind regards,
Kalina
the Telerik team