The actual Dictionary{TKey,TValue} of values that will be displayed in the combo box. This is a key value dictionary where the key contains the value that will be displayed in the ComboBox and the Value is the Unique identifier for the record. An object identifier (IBusinessObject.ID - IPrimaryKey.ObjectID) in the case of a BusinessObjectLookupList. or the Primary Key (field or composite fileds) in the case of a DatabaseLookupList or the key value for a SimpleLookupList. The Application developer can of course implement any other ILookupList that they require.