or
Telerik.Windows.Documents.Model.Span spn = new Telerik.Windows.Documents.Model.Span(); spn.Text = rnd.Next().ToString()+"[]"; spn.FontWeight = FontWeights.SemiBold; spn.Cursor = Cursors.Hand; selectedpara.Children.AddAfter(currentspan, spn);<telerik:RadPane Style="{StaticResource RadPaneHeaderStyle}"><Style x:Key="RadPaneHeaderStyle" TargetType="telerik:RadPane"> <Setter Property="Header" Value="{Binding HeaderTitle, Mode=TwoWay}" /> <Setter Property="HeaderTemplate"> <Setter.Value> <DataTemplate> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding}" ToolTip="{Binding}" /> </StackPanel> </DataTemplate> </Setter.Value> </Setter></Style>