I'm new to WF, just getting started on Team Build's build templates, and have a question: what's the best way for telling whether an InArgument is empty because it hasn't been set, or because an empty value has been provided?
For instance, I'm writing an Attrib code activity that allows you to set the attributes on a file. If I have a read-only file, and use my Attrib activity to set its Archive attribute, I don't want the ReadOnly attribute being cleared unless I explicitly
set its value to False in the activity.
I can see this as being possible if I don't use AutoProperties, but does WF have any builtin mechanism for checking whether an InArgument has been set?
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