Credit Card Expiration Date Selector WP7

Has anyone implemented a credit card expiration date selector in WP7 Mango? I've seen it done with WP7 Contrib prior to Mango (and was able to implement it on a non-mango project) however it doesn't seem to work right with the Mango SDK and the August Toolkit update.

Does anyone have any ideas on how I could implement this? I'd use the no开发者_StackOverflow中文版rmal datetimepicker however I don't need the "Day" selection, just the Month/Year. I know I can limit what's shown in the field after they select a date with the toolkit's datetimepicker, but I haven't found a way to hide the actual day picker.

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You can customize the DatePicker to exclude the date. This blog post explains how. Note that it was written pre-Mango so you might have to play with it a little bit to get it to work with the August 2011 toolkit release. But it should serve as a good starting point.