System.Object
   C1.WPF.DataGrid.Filters.DataGridTextFilterHelper
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         C1.WPF.DataGrid.DataGridRow
            C1.WPF.DataGrid.Filters.DataGridFilterRow
         C1.WPF.DataGrid.Filters.C1AdvancedFiltersBehavior
         C1.WPF.DataGrid.Filters.C1FullTextSearchBehavior
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     C1.WPF.DataGrid.DataGridTextFilter
                        C1.WPF.DataGrid.Filters.DataGridComboBoxTextFilter
                     C1.WPF.DataGrid.Filters.DataGridMultiLineCombinationsItem
                     C1.WPF.DataGrid.Filters.DataGridMultiLineItem
                        C1.WPF.DataGrid.Filters.DataGridMultiLineDateTimeItem
                        C1.WPF.DataGrid.Filters.DataGridMultiLineNumericItem
                        C1.WPF.DataGrid.Filters.DataGridMultiLineTextItem
                     System.Windows.Controls.ContentControl
                        C1.WPF.DataGrid.DataGridRowHeaderPresenter
                           C1.WPF.DataGrid.Filters.DataGridFilterRowHeaderPresenter
                        C1.WPF.DataGrid.Filters.DataGridContentFilter
                        C1.WPF.DataGrid.Filters.DataGridFilterItem
                     System.Windows.Controls.ItemsControl
                        C1.WPF.DataGrid.Filters.DataGridFilterList
                        C1.WPF.DataGrid.Filters.DataGridMultiLineFilter
                           C1.WPF.DataGrid.Filters.DataGridMultiLineDateTimeFilter
                           C1.WPF.DataGrid.Filters.DataGridMultiLineNumericFilter
                           C1.WPF.DataGrid.Filters.DataGridMultiLineTextFilter
                  System.Windows.Controls.Panel
                     C1.WPF.DataGrid.Filters.DataGridFilterListPanel

Reference

C1.WPF.DataGrid.Filters.4.5.2 Assembly