The ColumnHeaders and RowHeaders properties of the Grid class are of this collection type. Adding or removing headers to them automatically adds or removes parent columns and rows to the grid. Adding to or removing form the SubHeaders property of the Header class automatically adds or removes child columns or rows.

System.Object
    System.Collections.CollectionBase
        MindFusion.Diagramming.Wpf.Lanes.HeaderCollection

HeaderCollection Members
MindFusion.Diagramming.Wpf.Lanes Namespace