usbsnowcrash/Careerbuilder.com-API-for-.Net — pull request #12 by toastercup (2013-04-15 19:59:04+00:00)
Title: Adds /v2/user/checkexisting endpoint to wrapper. Includes tests.

Whether or not you want this in master is debatable, as it's been mentioned this endpoint is not 100% sanctioned. I've created a pull request anyways, in case you do! I've also structured the models differently for this new endpoint - 'CheckExisting' has its own namespace and its serializable request and response models are defined within.