public abstract class PropertyMappingCollection<TKey,TMapping> : Infragistics.Collections.ObservableCollectionExtended<TMapping>
where TMapping: new(), PropertyMappingBase<TKey>
'宣言
Public MustInherit Class PropertyMappingCollection
(Of TKey,TMapping As {New, PropertyMappingBase(Of TKey)})
Inherits Infragistics.Collections.ObservableCollectionExtended(Of TMapping)