ActivityCollection.IList.Add(Object) Method   
Definition
Important
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 virtual int System.Collections.IList.Add(System::Object ^ value) = System::Collections::IList::Add;int IList.Add(object value);override this.System.Collections.IList.Add : obj -> intFunction Add (value As Object) As Integer Implements IList.AddParameters
Returns
The zero-based index of the Object that was just added.