// do this for both the dependency property as well as the item's criterion property
var val = base.MY_PROPERTY;
return val ?? "NULL"; // this is the same as as saying, 'if If the value is not null, use it, else. Else, use whatever I wrote after the "??" operator'
</source>
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[[Category:Client|Configure Dynamic Selective Lists]]
[[Category:How-To|Configure Dynamic Selective Lists]]
[[Category:Studio|Configure Dynamic Selective Lists]]
[[Category:Web service|Configure Dynamic Selective Lists]]
==See also==