WPF: Expander Dropdown

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Do you ever get sick of hunting through a dropdown that has hundreds of items in no particular order. I do!! I've seen far too many LOB apps that feel the need to have hundreds items in a dropdown. So this week, I created the expander dropdown to at least provide some organization to those massive dropdowns ... I have some spare time since it doesn't look like I'm going to find an XBOX 360 until next summer [:)]. I saw some of Namita's samples and that really sparked the idea, so thanks to her.

Here is the unexpanded view:

And the expanded view:

And, for all of you still with the Sept CTP like me ... I'll try embedding the sample as a web browser application. Let me know how this works.

I removed the inline web browser app -- MD

And of course, the source:

https://mattdot.members.winisp.net/Blog/ExpanderDropdown/WpfBlogSamples.zip