Official ConstantContact .NET SDK. It provides installation, documentation, and usage. To install, download and build the CTCTWrapper project. Next, place developers' credentials. To use, include namespaces, obtain an access token, create a service object, and use the SDK. Authored by Brian Vysocky.
An email address can be the key to an online identity, and that's just what IDLight is using in its identity lookup API. By supplying either an email address or a URL to the IDLight API you could be turning the key to unlock a swath of identity information.