SPSite.Owner property

Gets or sets the owner of the site collection. (Read-only in sandboxed solutions.)

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

public SPUser Owner { get; set; }

Property value

Type: Microsoft.SharePoint.SPUser
An SPUser object that represents the owner.

The user that is specified by the Owner property should not be identical to the user that is specified by the SecondaryContact property.