.NET Framework 4.6 and 4.5
member IsUpdatingSelectedItems : bool with get
The following example shows how to use the IsUpdatingSelectedItems property in a class derived from MultiSelector.
foreach (object item in itemsToAdd)
Supported in: 4.6, 4.5, 4, 3.5 SP1, 3.0 SP2
.NET Framework Client Profile
Supported in: 4, 3.5 SP1