![](dotnetdiagramimages/C1_Win_Input_5_C1_Win_Input_Validation_PlaceholderCollection.png)
'Declaration
Public Class PlaceholderCollection Inherits System.Collections.ObjectModel.ObservableCollection(Of CustomPlaceholder)
public class PlaceholderCollection : System.Collections.ObjectModel.ObservableCollection<CustomPlaceholder>
System.Object
System.Collections.ObjectModel.Collection<T>
System.Collections.ObjectModel.ObservableCollection<T>
C1.Win.Input.Validation.PlaceholderCollection