Hello William,

Thank you for your feedback. I am glad that you resolved your issue and I believe that other community members may benefit from this as well.

Thanks again.

Stefan, that did the trick! Thank you very much!!

For anyone out there in internet land who wants to avoid the process of picking out which resources are required, here is a copy of my final xaml necessary (the formatting is apparently hideous but you can copy and paste into notepad then into VS):

[code]

<!--Required for override of Default XamGrid HeaderCellControl-->  <LinearGradientBrush x:Key="HeaderNormalBackgroundBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFfefefe"/>     <GradientStop Offset="0.5" Color="#FFeff1f2"/>     <GradientStop Offset="1" Color="#FFd0d6db"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <SolidColorBrush x:Key="HeaderNormalForegroundBrush" Color="#FF444444"/>  <SolidColorBrush x:Key="HeaderHoverForegroundBrush" Color="#FF444444"/>  <LinearGradientBrush x:Key="HeaderHoverBackgroundBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFfefefe"/>     <GradientStop Offset="0.35" Color="#FFf4f9fc"/>     <GradientStop Offset="1" Color="#FFa9cae6"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <SolidColorBrush x:Key="HeaderNormalBorderBrush" Color="#FFC9CACA"/>  <SolidColorBrush x:Key="HeaderMovingBackgroundBrush" Color="#FF000000"/>  <LinearGradientBrush x:Key="HiddenColumnIndicatorBrush" EndPoint="-2,17" StartPoint="-7,12" SpreadMethod="Repeat" MappingMode="Absolute">   <GradientStop Color="#FF708393" Offset="0.499"/>   <GradientStop Color="#FFe9eced" Offset="0.500"/>  </LinearGradientBrush>  <LinearGradientBrush x:Key="PopupBackgroundBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFFFFFFF"/>     <GradientStop Offset="1" Color="#FFFEFEFE"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <SolidColorBrush x:Key="FixedBorderFillBrush" Color="#FF8399A9"/>  <SolidColorBrush x:Key="FocusBrush" Color="#FF6DBDD1"/>  <SolidColorBrush x:Key="FilterSelectionItemBackgroundBrush" Color="#FFCAE4ED"/>  <SolidColorBrush x:Key="FilterSelectionItemBorderBrush" Color="#FF6DBDD1"/>  <SolidColorBrush x:Key="FilterSelectionVerticalBrush" Color="#FFF2F4F5"/>  <LinearGradientBrush x:Key="FilterCustomDialogBackgroundBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFFFFFFF"/>     <GradientStop Offset="1" Color="#FFeff1f2"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <LinearGradientBrush x:Key="GridBorderBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFa3aeb9"/>     <GradientStop Offset="0.37" Color="#FF8399a9"/>     <GradientStop Offset="0.370" Color="#FF718597"/>     <GradientStop Offset="1" Color="#FF617583"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <Style x:Key="ColumnChooserDialogBtn" TargetType="Button">   <Setter Property="Background" Value="{StaticResource FilterSelectionItemBackgroundBrush}"/>   <Setter Property="BorderBrush" Value="{StaticResource FilterSelectionItemBorderBrush}"/>   <Setter Property="Template">    <Setter.Value>     <ControlTemplate TargetType="Button">      <Grid Background="Transparent">       <VisualStateManager.VisualStateGroups>        <VisualStateGroup x:Name="CommonStates">         <VisualState x:Name="Normal"/>         <VisualState x:Name="MouseOver">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="0" Storyboard.TargetName="Bd" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="0">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="Pressed"/>         <VisualState x:Name="Disabled"/>        </VisualStateGroup>        <VisualStateGroup x:Name="FocusStates">         <VisualState x:Name="Focused"/>         <VisualState x:Name="Unfocused"/>        </VisualStateGroup>       </VisualStateManager.VisualStateGroups>       <Grid.ColumnDefinitions>        <ColumnDefinition Width="24"/>        <ColumnDefinition Width="*"/>       </Grid.ColumnDefinitions>       <Rectangle x:Name="Bd" Fill="{TemplateBinding Background}" Stroke="{TemplateBinding BorderBrush}" RadiusX="1" RadiusY="1" Visibility="Collapsed" Grid.ColumnSpan="2"/>       <Grid                                            x:Name="columnChooserIcon"                                            Width="14"                                            Height="14"                                            VerticalAlignment="Center"                                            HorizontalAlignment="Center">        <Path Fill="{StaticResource HeaderNormalBackgroundBrush}" Data="M 3,0 C3,0 3,4 3,4 3,4 0,4 0,4 0,4 0,14 0,14 0,14 7,14 7,14 7,14 7,10 7,10 7,10 14,10 14,10 14,10 14,0 14,0 14,0 3,0 3,0 z"/>        <Path Fill="{StaticResource GridBorderBrush}" Data="M 1,5 C1,5 6,5 6,5 6,5 6,7 6,7 6,7 1,7 1,7 1,7 1,5 1,5 zM 1,8 C1,8 6,8 6,8 6,8 6,10 6,10 6,10 1,10 1,10 1,10 1,8 1,8 zM 1,11 C1,11 6,11 6,11 6,11 6,13 6,13 6,13 1,13 1,13 1,13 1,11 1,11 zM 7,7 C7,7 13,7 13,7 13,7 13,9 13,9 13,9 7,9 7,9 7,9 7,7 7,7 zM 7,4 C7,4 13,4 13,4 13,4 13,6 13,6 13,6 7,6 7,6 7,6 7,4 7,4 zM 4,1 C4,1 13,1 13,1 13,1 13,3 13,3 13,3 4,3 4,3 4,3 4,1 4,1 zM 3,0 C3,0 3,4 3,4 3,4 0,4 0,4 0,4 0,14 0,14 0,14 7,14 7,14 7,14 7,10 7,10 7,10 14,10 14,10 14,10 14,0 14,0 14,0 3,0 3,0 z"/>        <Grid Margin="0,0,0,1">         <Border                                              Width="6"                                              Height="3"                                              Margin="0,0,2,2"                                              BorderBrush="Black"                                              BorderThickness="0,0,1,1"                                              CornerRadius="0,0,2,0"/>         <Path                                              Width="5"                                              Height="3"                                              Margin="3,1,0,0"                                              VerticalAlignment="Top"                                              Data="M 0,2 C0,2 0,3 0,3 0,3 5,3 5,3 5,3 5,2 5,2 5,2 4,2 4,2 4,2 4,1 4,1 4,1 3,1 3,1 3,1 3,0 3,0 3,0 2,0 2,0 2,0 2,1 2,1 2,1 1,1 1,1 1,1 1,2 1,2 1,2 0,2 0,2 z"                                              Fill="Black"                                              Stretch="Fill"/>        </Grid>       </Grid>       <ContentPresenter x:Name="contentPresenter" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" Grid.Column="1"/>      </Grid>     </ControlTemplate>    </Setter.Value>   </Setter>  </Style>  <LinearGradientBrush x:Key="HeaderCellGlyphBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFa3aeb9"/>     <GradientStop Offset="0.37" Color="#FF8399a9"/>     <GradientStop Offset="0.370" Color="#FF718597"/>     <GradientStop Offset="1" Color="#FF617583"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <LinearGradientBrush x:Key="FilterOperatorGlyphBrush" StartPoint="0,0" EndPoint="0,1">   <LinearGradientBrush.GradientStops>    <GradientStopCollection>     <GradientStop Offset="0" Color="#FFa3aeb9"/>     <GradientStop Offset="0.37" Color="#FF8399a9"/>     <GradientStop Offset="0.370" Color="#FF718597"/>     <GradientStop Offset="1" Color="#FF617583"/>    </GradientStopCollection>   </LinearGradientBrush.GradientStops>  </LinearGradientBrush>  <SolidColorBrush x:Key="MoveIndicatorBrush" Color="#FF6DBDD1"/>  <SolidColorBrush x:Key="ResizeIndicatorBrush" Color="#59000000"/>

 <!--Default XamGrid HeaderCellControl (Override default to remove sigma) -->  <Style TargetType="igPrim:HeaderCellControl" x:Key="NoSigmaHeaderStyle">   <Setter Property="FontSize" Value="11" />   <Setter Property="Background" Value="{StaticResource HeaderNormalBackgroundBrush}"   />   <Setter Property="Foreground" Value="{StaticResource HeaderNormalForegroundBrush}"/>   <Setter Property="BorderBrush" Value="{StaticResource HeaderNormalBorderBrush}"/>   <Setter Property="BorderThickness" Value="0,0,1,1"/>   <Setter Property="HorizontalContentAlignment" Value="Left"/>   <Setter Property="Padding" Value="8,4"/>   <Setter Property="Template">    <Setter.Value>     <ControlTemplate TargetType="igPrim:HeaderCellControl">      <igPrim:SimpleClickableContainer        x:Name="NormalFill"        Background="{TemplateBinding Background}"        BorderBrush="{TemplateBinding BorderBrush}"        BorderThickness="{TemplateBinding BorderThickness}">       <igBase:Commanding.Commands>        <igBase:CommandSourceCollection>         <ig:XamGridColumnCommandSource CommandType="Select" EventName="SimpleClick"/>         <ig:XamGridColumnCommandSource CommandType="SortToggle" EventName="SimpleClick"/>        </igBase:CommandSourceCollection>       </igBase:Commanding.Commands>       <Grid x:Name="Bd">        <Grid.ColumnDefinitions>         <ColumnDefinition Width="Auto"/>         <ColumnDefinition ></ColumnDefinition>         <ColumnDefinition Width="Auto"/>         <ColumnDefinition Width="Auto"/>         <ColumnDefinition Width="Auto"/>        </Grid.ColumnDefinitions>        <igPrim:HeaderDropDownControl Padding="0" Visibility="Collapsed" x:Name="HiddenLeftAdjacentColumnsElement" Grid.Column="0">         <ToolTipService.ToolTip>          <ToolTip Content="{Binding Cell.Column.ColumnLayout.Grid.ColumnChooserSettings.HiddenColumnIndicatorToolTipText, RelativeSource={RelativeSource TemplatedParent}}"/>         </ToolTipService.ToolTip>         <igPrim:HeaderDropDownControl.OpenButtonContent>          <Rectangle Fill="{StaticResource HiddenColumnIndicatorBrush}" Width="10" HorizontalAlignment="Left"/>         </igPrim:HeaderDropDownControl.OpenButtonContent>         <Grid>          <Border x:Name="ColumnChooserBd" MaxHeight="200" Background="{StaticResource PopupBackgroundBrush}" BorderBrush="{StaticResource FocusBrush}" BorderThickness="1" CornerRadius="3" Padding="1">           <Grid>            <Grid.ColumnDefinitions>             <ColumnDefinition MinWidth="24"  MaxWidth="24"/>             <ColumnDefinition Width="*"/>            </Grid.ColumnDefinitions>            <Grid.RowDefinitions>             <RowDefinition />             <RowDefinition Height="Auto"/>            </Grid.RowDefinitions>            <Border Grid.RowSpan="2" Background="{StaticResource FilterSelectionVerticalBrush}"/>            <ListBox DataContext="{x:Null}" ItemsSource="{Binding Cell.ColumnsHiddenToLeft, RelativeSource={RelativeSource TemplatedParent}}" BorderThickness="0" Padding="0" Margin="0" Grid.ColumnSpan="2">             <ListBox.ItemTemplate>              <DataTemplate>               <TextBlock Text="{Binding DisplayNameResolved}"/>              </DataTemplate>             </ListBox.ItemTemplate>             <igBase:Commanding.Commands>              <igBase:CommandSourceCollection>               <ig:XamGridColumnCommandSource ParameterBinding="{Binding SelectedItem}" EventName="SelectionChanged" CommandType="Show"/>               <igPrim:XamGridPopupCommandSource CommandType="ClosePopup" EventName="SelectionChanged"/>              </igBase:CommandSourceCollection>             </igBase:Commanding.Commands>            </ListBox>            <StackPanel Background="Transparent" Grid.Row="1" Grid.ColumnSpan="2">             <Rectangle x:Name="separator" Height="1" Fill="{StaticResource FocusBrush}"/>             <Button Margin="0,1,0,0" Style="{StaticResource ColumnChooserDialogBtn}">              <igBase:Commanding.Commands>               <igBase:CommandSourceCollection>                <ig:XamGridColumnChooserCommandSource CommandType="Open" EventName="Click"/>                <igPrim:XamGridPopupCommandSource CommandType="ClosePopup" EventName="Click"/>               </igBase:CommandSourceCollection>              </igBase:Commanding.Commands>              <TextBlock Text="{Binding Cell.Column.ColumnLayout.Grid.ColumnChooserSettings.ColumnChooserDisplayText, RelativeSource={RelativeSource TemplatedParent}}" Foreground="{StaticResource HeaderNormalForegroundBrush}"/>             </Button>            </StackPanel>           </Grid>          </Border>         </Grid>        </igPrim:HeaderDropDownControl>        <ContentPresenter Grid.Column="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>        <Grid         Grid.Column="2"         x:Name="SortAndPinIndicators"         HorizontalAlignment="Right"         Margin="0,0,5,0"         Background="{TemplateBinding Background}">         <Grid.ColumnDefinitions>          <ColumnDefinition Width="Auto"/>          <ColumnDefinition Width="Auto"/>          <ColumnDefinition Width="Auto"/>          <ColumnDefinition Width="Auto"/>          <ColumnDefinition Width="Auto"/>         </Grid.ColumnDefinitions>         <Path          x:Name="SortedDescending"          HorizontalAlignment="Right"          Margin="3,0"          VerticalAlignment="Center"          Data="M 0 0 L 4 4 L 8 0 Z"          Fill="{StaticResource HeaderCellGlyphBrush}"          Visibility="Collapsed"/>         <Path          x:Name="SortedAscending"          HorizontalAlignment="Right"          Margin="3,0"          VerticalAlignment="Center"          Data="M0,4 L8,4 L4,0 z"          Fill="{StaticResource HeaderCellGlyphBrush}"          Visibility="Collapsed"/>         <Grid          x:Name="PinnedIndicator"          Grid.Column="3"          Background="Transparent"          Cursor="Hand"          Visibility="Collapsed">          <Path           Width="7"           Height="10"           Margin="3,0"           Data="M 6,4 C6,4 8,4 8,4 8,4 8,9 8,9 8,9 6,9 6,9 6,9 6,4 6,4 zM 5,3 C5,3 5,9 5,9 5,9 4,9 4,9 4,9 4,10 4,10 4,10 7,10 7,10 7,10 7,13 7,13 7,13 8,13 8,13 8,13 8,10 8,10 8,10 11,10 11,10 11,10 11,9 11,9 11,9 10,9 10,9 10,9 10,3 10,3 10,3 5,3 5,3 z"           Fill="{StaticResource HeaderCellGlyphBrush}"            Stretch="Fill"/>          <igBase:Commanding.Command>           <ig:XamGridColumnCommandSource CommandType="Unfix" EventName="MouseLeftButtonDown">           </ig:XamGridColumnCommandSource>          </igBase:Commanding.Command>         </Grid>         <Grid          x:Name="UnpinnedIndicator"          Grid.Column="3"          Background="Transparent"          Cursor="Hand"          Visibility="Collapsed">          <Path           Width="10"           Height="7"           Margin="3,0"           Data="M 12,7 C12,7 12,9 12,9 12,9 7,9 7,9 7,9 7,7 7,7 7,7 12,7 12,7 zM 13,6 C13,6 7,6 7,6 7,6 7,5 7,5 7,5 6,5 6,5 6,5 6,8 6,8 6,8 3,8 3,8 3,8 3,9 3,9 3,9 6,9 6,9 6,9 6,12 6,12 6,12 7,12 7,12 7,12 7,11 7,11 7,11 13,11 13,11 13,11 13,6 13,6 z"           Fill="{StaticResource HeaderCellGlyphBrush}"           Stretch="Fill"/>          <igBase:Commanding.Command>           <ig:XamGridColumnCommandSource CommandType="Fix" EventName="MouseLeftButtonDown">           </ig:XamGridColumnCommandSource>          </igBase:Commanding.Command>         </Grid>         <igPrim:HeaderDropDownControl x:Name="SummaryHeaderDropDownControl" Background="Transparent" Visibility="Collapsed" Grid.Column="1">          <igPrim:HeaderDropDownControl.OpenButtonContent>           <Path            Data="M 0,0 C0,0 5,0 5,0 5,0 5,1 5,1 5,1 2,1 2,1 2,1 4,3.5 4,3.5 4,3.5 2,6 2,6 2,6 5,6 5,6 5,6 5,7 5,7 5,7 0,7 0,7 0,7 0,6 0,6 0,6 2,3.5625 2,3.5625 2,3.5625 0,1 0,1 0,1 0,0 0,0 z"            Fill="{StaticResource HeaderCellGlyphBrush}"            Width="5"            Height="7"            x:Name="summarySigmaIcon"            StrokeThickness="0"/>          </igPrim:HeaderDropDownControl.OpenButtonContent>          <igPrim:SummarySelectionControl Cell="{Binding Path=Cell,RelativeSource={RelativeSource TemplatedParent}}"></igPrim:SummarySelectionControl>         </igPrim:HeaderDropDownControl>         <igPrim:HeaderDropDownControl AllowResizing="true" x:Name="FilterHeaderDropDownControl" Visibility="Collapsed" Background="Transparent" Grid.Column="2">          <igPrim:HeaderDropDownControl.OpenButtonContent>           <Grid Width="11" Height="8">            <Path             x:Name="clearFilterGlyphStroke"             Width="11"             Height="8"             HorizontalAlignment="Center"             VerticalAlignment="Center"             Data="M 0,0 C0,0 11,0 11,0 11,0 7,4 7,4 7,4 7,8 7,8 7,8 4,8 4,8 4,8 4,4 4,4 4,4 0,0 0,0 z"             Fill="{StaticResource HeaderCellGlyphBrush}"             Stretch="Fill"/>            <Path             x:Name="clearFilterGlyphFill"             Width="7"             Height="6"             HorizontalAlignment="Center"             VerticalAlignment="Center"             Data="M 0,0 C0,0 7,0 7,0 7,0 4,3 4,3 4,3 4,6 4,6 4,6 3,6 3,6 3,6 3,3 3,3 3,3 0,0 0,0 z"             Fill="#FFFFFFFF"             Stretch="Fill"/>            <Path             x:Name="redFilterGlyphFill"             Width="7"             Height="6"             HorizontalAlignment="Center"             VerticalAlignment="Center"             Data="M 0,0 C0,0 7,0 7,0 7,0 4,3 4,3 4,3 4,6 4,6 4,6 3,6 3,6 3,6 3,3 3,3 3,3 0,0 0,0 z"             Fill="{StaticResource FocusBrush}"             Stretch="Fill"             Visibility="Collapsed"             />           </Grid>          </igPrim:HeaderDropDownControl.OpenButtonContent>          <igPrim:FilterSelectorControl Height="370" Width="250" MinWidth="250" MinHeight="370" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch"  Cell="{Binding Path=Cell,RelativeSource={RelativeSource TemplatedParent}}"></igPrim:FilterSelectorControl>         </igPrim:HeaderDropDownControl>

        <Grid x:Name="VisibilityToggleButton" Background="Transparent" Width="14" Visibility="Collapsed" Grid.Column="4" Cursor="Hand">          <Path                             Width="8"                             Height="7"                             Data="M 7,0 C7,0 7,1 7,1 7,1 6,1 6,1 6,1 6,2 6,2 6,2 5,2 5,2 5,2 5,3 5,3 5,3 4,3 4,3 4,3 4,4 4,4 4,4 5,4 5,4 5,4 5,5 5,5 5,5 6,5 6,5 6,5 6,6 6,6 6,6 7,6 7,6 7,6 7,7 7,7 7,7 8,7 8,7 8,7 8,5 8,5 8,5 7,5 7,5 7,5 7,4 7,4 7,4 6,4 6,4 6,4 6,3 6,3 6,3 7,3 7,3 7,3 7,2 7,2 7,2 8,2 8,2 8,2 8,0 8,0 8,0 7,0 7,0 zM 0,3 C0,3 0,4 0,4 0,4 1,4 1,4 1,4 1,5 1,5 1,5 2,5 2,5 2,5 2,6 2,6 2,6 3,6 3,6 3,6 3,7 3,7 3,7 4,7 4,7 4,7 4,6 4,6 4,6 4,5 4,5 4,5 3,5 3,5 3,5 3,4 3,4 3,4 2,4 2,4 2,4 2,3 2,3 2,3 3,3 3,3 3,3 3,2 3,2 3,2 4,2 4,2 4,2 4,1 4,1 4,1 4,0 4,0 4,0 3,0 3,0 3,0 3,1 3,1 3,1 2,1 2,1 2,1 2,2 2,2 2,2 1,2 1,2 1,2 1,3 1,3 1,3 0,3 0,3 z"                             Fill="{StaticResource HeaderCellGlyphBrush}"/>          <igBase:Commanding.Command>           <ig:XamGridColumnCommandSource CommandType="Hide" EventName="MouseLeftButtonDown"/>          </igBase:Commanding.Command>         </Grid>

       </Grid>        <igPrim:HeaderDropDownControl Padding="0" Visibility="Collapsed" x:Name="HiddenRightAdjacentColumnsElement" Grid.Column="4">         <ToolTipService.ToolTip>          <ToolTip Content="{Binding Cell.Column.ColumnLayout.Grid.ColumnChooserSettings.HiddenColumnIndicatorToolTipText, RelativeSource={RelativeSource TemplatedParent}}"/>         </ToolTipService.ToolTip>         <igPrim:HeaderDropDownControl.OpenButtonContent>          <Rectangle Fill="{StaticResource HiddenColumnIndicatorBrush}" Width="10" HorizontalAlignment="Right"/>         </igPrim:HeaderDropDownControl.OpenButtonContent>         <Grid>          <Border x:Name="ColumnChooserBdRight" MaxHeight="200" Background="{StaticResource PopupBackgroundBrush}" BorderBrush="{StaticResource FocusBrush}" BorderThickness="1" CornerRadius="3" Padding="1">           <Grid>            <Grid.ColumnDefinitions>             <ColumnDefinition MinWidth="24" MaxWidth="24"/>             <ColumnDefinition Width="*"/>            </Grid.ColumnDefinitions>            <Grid.RowDefinitions>             <RowDefinition />             <RowDefinition Height="Auto"/>            </Grid.RowDefinitions>            <Border Grid.RowSpan="2" Background="{StaticResource FilterSelectionVerticalBrush}"/>            <ListBox DataContext="{x:Null}"  ItemsSource="{Binding Cell.ColumnsHiddenToRight, RelativeSource={RelativeSource TemplatedParent}}" BorderThickness="0" Padding="0" Margin="0" Grid.ColumnSpan="2">             <ListBox.ItemTemplate>              <DataTemplate>               <TextBlock Text="{Binding DisplayNameResolved}"/>              </DataTemplate>             </ListBox.ItemTemplate>             <igBase:Commanding.Commands>              <igBase:CommandSourceCollection>               <ig:XamGridColumnCommandSource ParameterBinding="{Binding SelectedItem}" EventName="SelectionChanged" CommandType="Show"/>               <igPrim:XamGridPopupCommandSource CommandType="ClosePopup" EventName="SelectionChanged"/>              </igBase:CommandSourceCollection>             </igBase:Commanding.Commands>            </ListBox>            <StackPanel Background="Transparent" Grid.Row="1" Grid.ColumnSpan="2">             <Rectangle x:Name="separatorRight" Height="1" Fill="{StaticResource FocusBrush}"/>             <Button Margin="0,1,0,0" Style="{StaticResource ColumnChooserDialogBtn}">              <igBase:Commanding.Commands>               <igBase:CommandSourceCollection>                <ig:XamGridColumnChooserCommandSource CommandType="Open" EventName="Click"/>                <igPrim:XamGridPopupCommandSource CommandType="ClosePopup" EventName="Click"/>               </igBase:CommandSourceCollection>              </igBase:Commanding.Commands>              <TextBlock Text="{Binding Cell.Column.ColumnLayout.Grid.ColumnChooserSettings.ColumnChooserDisplayText, RelativeSource={RelativeSource TemplatedParent}}" Foreground="{StaticResource HeaderNormalForegroundBrush}"/>             </Button>

           </StackPanel>           </Grid>          </Border>         </Grid>        </igPrim:HeaderDropDownControl>       </Grid>       <VisualStateManager.VisualStateGroups>        <VisualStateGroup x:Name="CommonStates">         <VisualState x:Name="Normal"/>         <VisualState x:Name="MouseOver">          <Storyboard>           <ObjectAnimationUsingKeyFrames             BeginTime="00:00:00"             Duration="00:00:00.001"             Storyboard.TargetName="Bd"             Storyboard.TargetProperty="Background">            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{StaticResource HeaderHoverBackgroundBrush}">            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>           <ObjectAnimationUsingKeyFrames             BeginTime="00:00:00"             Duration="00:00:00.001"             Storyboard.TargetName="SortAndPinIndicators"             Storyboard.TargetProperty="Background">            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{StaticResource HeaderHoverBackgroundBrush}">            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="Moving">          <Storyboard>           <DoubleAnimation BeginTime="00:00:00" Duration="00:00:00"             Storyboard.TargetName="NormalFill"             Storyboard.TargetProperty="Opacity" To=".4" />           <ObjectAnimationUsingKeyFrames             BeginTime="00:00:00"             Duration="00:00:00.001"             Storyboard.TargetName="Bd"             Storyboard.TargetProperty="Background">            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{StaticResource HeaderMovingBackgroundBrush}">            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <VisualStateGroup x:Name="FixedIndicatorStates">         <VisualState x:Name="NotFixable"/>         <VisualState x:Name="Pinned">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="PinnedIndicator" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="Unpinned">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="UnpinnedIndicator" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <!--<VisualStateGroup x:Name="SummaryStates">         <VisualState x:Name="Summable">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="SummaryHeaderDropDownControl" Storyboard.TargetProperty="(UIElement.Visibility)">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="Unsummable">         </VisualState>        </VisualStateGroup>-->        <VisualStateGroup x:Name="SortedStates">         <VisualState x:Name="NotSorted">         </VisualState>         <VisualState x:Name="Ascending">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="SortedAscending" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="Descending">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="SortedDescending" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <VisualStateGroup x:Name="HeaderFilterStates">         <VisualState x:Name="NoIcon">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="FilterHeaderDropDownControl" Storyboard.TargetProperty="(UIElement.Visibility)">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Collapsed</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="FilterIcon">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="FilterHeaderDropDownControl" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <VisualStateGroup x:Name="HeaderFilterAppliedStates">         <VisualState x:Name="NotFiltered">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="clearFilterGlyphFill" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="redFilterGlyphFill" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Collapsed</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>         <VisualState x:Name="Filtered">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="clearFilterGlyphFill" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Collapsed</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="redFilterGlyphFill" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <VisualStateGroup x:Name="VisibilityIconStates">         <VisualState x:Name="VisibilityIconHidden"/>         <VisualState x:Name="VisibilityIconVisible">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="VisibilityToggleButton" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <VisualStateGroup x:Name="LeftAdjacentColumnHiddenStates">         <VisualState x:Name="NoHiddenLeftAdjacentColumns"/>         <VisualState x:Name="HiddenLeftAdjacentColumns">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="HiddenLeftAdjacentColumnsElement" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>        <VisualStateGroup x:Name="RightAdjacentColumnHiddenStates">         <VisualState x:Name="NoHiddenRightAdjacentColumns"/>         <VisualState x:Name="LastVisibleColumnWithHiddenRightAdjacentColumns">          <Storyboard>           <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="HiddenRightAdjacentColumnsElement" Storyboard.TargetProperty="Visibility">            <DiscreteObjectKeyFrame KeyTime="00:00:00">             <DiscreteObjectKeyFrame.Value>              <Visibility>Visible</Visibility>             </DiscreteObjectKeyFrame.Value>            </DiscreteObjectKeyFrame>           </ObjectAnimationUsingKeyFrames>          </Storyboard>         </VisualState>        </VisualStateGroup>       </VisualStateManager.VisualStateGroups>      </igPrim:SimpleClickableContainer>     </ControlTemplate>    </Setter.Value>   </Setter>  </Style>

[\code]

Hello William,

Thank you for your post. I have been looking into it and I can suggest you copy the default Style of the HeaderCellControl and the Resources used in it from here by default:

C:\Program Files (x86)\Infragistics\2013.2\Silverlight\DefaultStyles\XamGrid\generic.xaml file

Once you did this you can comment a VisualState called “SummaryStates”, which controls the “SummaryHeaderDropDownControl” element visibility. The control is collapsed by default. Please let me know if this helps you or you have further questions on this matter.

Looking forward for your reply.