The treelist's column collection.
public class TreeListColumnCollection : ColumnCollectionBase<TreeListColumn>
Public Class TreeListColumnCollection Inherits ColumnCollectionBase(Of TreeListColumn)
The treelist stores its columns within the TreeListControl.Columns collection. The TreeListColumnCollection class provides methods that can be used to add, delete, or access individual columns and perform other common collection management tasks. Individual columns are specified by TreeListColumn objects, and can be accessed by their field name or using indexed notation.
To learn more, see Creating Columns and Binding Them to Data Properties.