When you upgrade a Web Parts control to a newer version, there might be changes to the personalizable properties on the upgraded class. For example, an upgraded version of a Web Parts control might no longer support properties that were available in previous versions. In such a scenario, the Web Parts control set might load personalization data from the underlying data store, but have no properties against which to apply this data. If a control implements the System.Web.UI.WebControls.WebParts.IVersioningPersonalizable interface, the Web Parts control is passed the orphaned personalization data. The application can then use this data to update properties in the newer version, or use the data in some other manner. Note that if orphaned properties are detected when importing Web Parts controls, the IVersioningPersonalizable.Load(IDictionary) method is also called.

Namespace: System.Web.UI.WebControls.WebParts
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0