.NET client API reference for SharePoint Online
The Client Side Object Model (CSOM) API for .NET.
Applies to: SharePoint Online
SharePoint Online provides several APIs that allow you to manipulate content on SharePoint sites. This library contains APIs that you can use to build .NET client (CSOM), Silverlight, Windows Phone, and JavaScript apps for SharePoint sites and farm solutions.
For information about other APIs , see the API overview in Reference for SharePoint 2013.