I applied this style to the grid

<UserControl.Resources>
        <local:GridTestViewModel x:Key="ViewModel" />
       
        <Style x:Key="AltRowStyle" TargetType="infra:CellControl">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="infra:CellControl">
                        <Grid>
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="CommonStates">
                                    <VisualState x:Name="Normal" />
                                    <VisualState x:Name="MouseOver" />
                                    <VisualState x:Name="Alternate">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="AltElem" Storyboard.TargetProperty="(UIElement.Visibility)">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <Visibility>Visible
                                                        </Visibility>
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="AltElementHightlight" Storyboard.TargetProperty="(UIElement.Visibility)">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <Visibility>Visible
                                                        </Visibility>
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Border
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Background="{TemplateBinding Background}"
                        x:Name="Root" />
                            <Border
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Visibility="Collapsed"
                        x:Name="AltElem">
                                <Border.Background>
                                    <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
                                        <LinearGradientBrush.GradientStops>
                                            <GradientStopCollection>
                                                <GradientStop Offset="0" Color="#FF77dafc" />
                                                <GradientStop Offset="0.983" Color="#FF5bd4fd" />
                                            </GradientStopCollection>
                                        </LinearGradientBrush.GradientStops>
                                    </LinearGradientBrush>
                                </Border.Background>
                            </Border>
                            <Rectangle
                        Fill="#7FFFFFFF"
                        x:Name="AltElementHightlight"
                        Visibility="Collapsed"
                        Margin="0,1,0,0"
                        Height="1"
                        VerticalAlignment="Top" />
                            <ContentPresenter
                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                        Margin="{TemplateBinding Padding}" />
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </UserControl.Resources>

and it hides the "rectangle" in the selected cell/row ...

and all of this features

<SolidColorBrush x:Key="CellItemNormalBackgroundBrush" Color="#FFFFFFFF"/>
        <SolidColorBrush x:Key="CellItemNormalBorderBrush" Color="#FFC9CACA"/>
        <SolidColorBrush x:Key="CellItemSelectedBorderBrush" Color="#FF6DC5D1"/>
        <SolidColorBrush x:Key="CellRowHoverBackgroundBrush" Color="#FFD3E8FB"/>
        <SolidColorBrush x:Key="CellItemAltNormalBackgroundBrush" Color="#FF90B9E4"/>
        <SolidColorBrush x:Key="CellItemSelectedBackgroundBrush" Color="#FFD5EAF2"/>

how can I show those and the alternate row style in one style?