or
							public class StringFilteringControl : FilteringControl{    public override void Prepare(GridViewBoundColumnBase column)    {        base.Prepare(column);   // <-- This fires OnCollectionChanged if actions are removed
        var vm = this.DataContext as FilteringViewModel;                  if (vm != null)        {            vm.AvailableActions.Remove(FilterOperator.IsContainedIn);            vm.AvailableActions.Remove(FilterOperator.IsNotContainedIn);        }    }}
<telerik:RadDocking HasDocumentHost="False" Grid.Row="2" PreviewUnpin="RadDocking_PreviewUnpin">     <telerik:RadSplitContainer InitialPosition="DockedBottom">         <telerik:RadPaneGroup IsContentPreserved="True">             <telerik:RadPane                Header="Grid"                CanFloat="False"                CanUserClose="False"                ContextMenuTemplate="{x:Null}">                    <Grid>                     <telerik:RadGridView AutoGenerateColumns="False" SelectionMode="Multiple" RowIndicatorVisibility="Collapsed" ItemsSource="{Binding}" IsReadOnly="True" SelectionUnit="Cell">                         <telerik:RadGridView.Columns>                             <telerik:GridViewSelectColumn Width="20"/>                             <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=InventoryDate, Mode=OneWay}" Header="Inventory Date" DataFormatString="{}{0:MM/dd/yyyy}"/>                             <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=BridgeNumber, Mode=OneWay}" Header="Bridge #"/>                             <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=CreatedBy, Mode=OneWay}" Header="Created By"/>                             <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=CreatedDate, Mode=OneWay}" Header="Created Date" DataFormatString="{}{0:MM/dd/yyyy}"/>                         </telerik:RadGridView.Columns>                     </telerik:RadGridView>                 </Grid>             </telerik:RadPane>         </telerik:RadPaneGroup>     </telerik:RadSplitContainer> </telerik:RadDocking>Thanks for any suggestions.
Steve 
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