![](dotnetdiagramimages/C1_Web_Wijmo_Controls_45_C1_Web_Wijmo_Controls_C1ComboBox_C1ComboColumnCollection.png)
'Declaration Public Class C1ComboColumnCollection Inherits C1.Web.Wijmo.Controls.Base.Collections.C1ObservableItemCollection(Of C1ComboBox,C1ComboBoxColumn)
public class C1ComboColumnCollection : C1.Web.Wijmo.Controls.Base.Collections.C1ObservableItemCollection<C1ComboBox,C1ComboBoxColumn>
System.Object
System.Collections.ObjectModel.Collection<T>
C1.Web.Wijmo.Controls.Base.Collections.C1ObservableItemCollection<TOwner,TItem>
C1.Web.Wijmo.Controls.C1ComboBox.C1ComboColumnCollection