How to check Apple APN device token - WCF.NET

I am creating a WCF REST web service called by a mobile application to insert an Apple device token into the database. I would like to check the device token before pasting into the database. Is there anyway to check the device token to find out if it really is?

I searched around the forum and could not find any sample code (in .NET) to do this, there were recommendations that I should use the Apple FeedBack service, but how to do it in .NET?

Can someone please provide me a sample code to validate the Apple Device token in .NET.

Many thanks,