Retrieve Data for SSL Tracking

I need to write an 开发者_运维技巧app that retrieves data on expiring SSL certs. What is the best way to locate this data for application purposes?

X509Certificate2 Class:

• NotBefore Property - Gets the date in local time on which a certificate becomes valid.

• NotAfter Property - Gets the date in local time after which a certificate is no longer valid.

For your reference, here are a few applications that do this type of thing. They may give you some ideas regarding features and interface.

cert scanner

checkcertificate

certificate expiry reporter

cert expiry checker