SPSite.LastContentModifiedDate Property

Gets the date and time in Coordinated Universal Time (UTC) when the content of the site was last changed.

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online

public DateTime LastContentModifiedDate { get; }

Property Value

Type: System.DateTime
A System.DateTime object that contains the date and time when the content was last changed.