FirstUniqueAncestorSecurableObject Property
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SPWeb.FirstUniqueAncestorSecurableObject Property

An ISecurableObject interface that represents the first unique ancestor website. This is the object where the ACL is defined. For a web with unique permission the First Unique Ancestor is itself. For a web that inherits permissions the First Unique Ancestor is one of the ancestral webs.

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

public override SPSecurableObject FirstUniqueAncestorSecurableObject { get; }
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