CMS and E-Commerce Platforms Which are Using Microsoft .NET technologies

SiteCore e-Commerce: A Microsoft .NET based Enterprise Content Management System, and E-Commerce Foundation with many capabilities such as marketing, profile system, personalization,  … etc.
“In the near term, the Orchard project is focused on delivering a .NET-based CMS application that will allow users to rapidly create content-driven Websites, and an extensibility framework that will allow developers and customizers to provide additional functionality through module extensions and themes.”