Read Smart Card in C#

I need some sample code in C# .NET that allows me to integrate a Smart Card into my application. ## Deliverables I need some C# .NET code to work with a smart card reader. I'm? trying to use? <[login to view URL]>? but their sample program crashes when I try to read a smart card. I need the smart card functionality to sign digitallly a file. The programmer should have already developed smart card application so that he can offer me some consulting. I'm new to smart cards, but I need to have my program ready in 7 days. Basically, I don't need a real program, but some code/examples/etc. to help me understand programming a smart card. I NEED TO HAVE THE DEVELOPER AVAILABLE VIA MSN? (or other IM) at least 8 hours / day because I need to chat and have problems resolved **immediately**. Time is VERY urgent for this project! Thanks.