<Style TargetType="telerik:RadRibbonWindow" BasedOn="{StaticResource RadRibbonWindowStyle}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="telerik:RadRibbonWindow">
                <Border x:Name="outerBorder" Background="{TemplateBinding WindowBackground}" CornerRadius="{TemplateBinding CornerRadius}">
                    <Grid x:Name="MaximizeWindowDecorator">
                        <Grid telerik:CornerRadiusHelper.ClipRadius="{Binding ElementName=outerBorder, Path=CornerRadius}" telerik:CornerRadiusHelper.ClipRadiusOffset="{TemplateBinding telerik:CornerRadiusHelper.ClipRadiusOffset}" Margin="{TemplateBinding BorderThickness}">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="28"/>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <Border Grid.Row="0" Grid.Column="1" Background="{telerik:Office2019Resource ResourceKey=HeaderBackgroundBrush}"/>
                            <Grid Grid.ColumnSpan="3">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="Auto"/>
                                    <ColumnDefinition Width="*"/>
                                </Grid.ColumnDefinitions>
                                <StackPanel x:Name="IconPanel" Orientation="Horizontal" HorizontalAlignment="Left" Visibility="{TemplateBinding IconVisibility}" VerticalAlignment="Center" Margin="4 0 0 0">
                                    <Image
                                    Name="PART_Icon"
                                    shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                    Source="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Icon, Converter={StaticResource IconConverter}}"
                                    Width="{Binding Path=SmallIconSize.Width, Source={x:Static shell:SystemParameters2.Current}}"
                                    Height="{Binding Path=SmallIconSize.Height, Source={x:Static shell:SystemParameters2.Current}}"/>
                                    <Rectangle Width="1" Margin="4 0" Fill="{telerik:Office2019Resource ResourceKey=MainBorderBrush}"/>
                                </StackPanel>
                                <telerikRibbonViewPrimitives:WindowTitle x:Name="WindowTitle"
                                Grid.Column="1"
                                Title="{TemplateBinding Title}"
                                Style="{TemplateBinding TitleBarStyle}"
                                VerticalAlignment="Center"
                                HorizontalAlignment="Center"
                                Margin="0 0 65 0"/>
                            </Grid>
                            <StackPanel x:Name="buttonPanel" Orientation="Horizontal" Grid.ColumnSpan="3" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="0 0 2 0">
                                <telerik:RadButton x:Name="minimizeButton"
                                                   shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                                   ToolTipService.ToolTip="Minimize"
                                                   Command="{x:Static shell:SystemCommands.MinimizeWindowCommand}"
                                                   Style="{StaticResource RibbonWindowButtonStyle}"
                                                   CornerRadius="{Binding Path=CornerRadius.TopRight, RelativeSource={RelativeSource TemplatedParent}}">
                                    <telerik:RadButton.ToolTip>
                                        <TextBlock Text="{telerik:LocalizableResource Key=RibbonWindowMinimize}"/>
                                    </telerik:RadButton.ToolTip>
                                    <telerik:RadGlyph Glyph="{StaticResource GlyphMinimize}"/>
                                </telerik:RadButton>
                                <telerik:RadToggleButton x:Name="maximizeButton"
                                                         shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                                         IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=WindowState, Converter={StaticResource BooleanToWindowStateConverter}, Mode=TwoWay}"
                                                         Style="{StaticResource RadRibbonWindowToggleButtonStyle}"
                                                         CornerRadius="{Binding Path=CornerRadius.TopRight, RelativeSource={RelativeSource TemplatedParent}}">
                                    <telerik:RadGlyph Glyph="{StaticResource GlyphWindow}"/>
                                </telerik:RadToggleButton>
                                <telerik:RadButton x:Name="closeButton"
                                                   shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                                   Command="{x:Static shell:SystemCommands.CloseWindowCommand}"
                                                   Style="{StaticResource RibbonWindowButtonStyle}"
                                                   CornerRadius="{Binding Path=CornerRadius.TopRight, RelativeSource={RelativeSource TemplatedParent}}">
                                    <telerik:RadButton.ToolTip>
                                        <TextBlock Text="{telerik:LocalizableResource Key=RibbonWindowClose}"/>
                                    </telerik:RadButton.ToolTip>
                                    <telerik:RadGlyph Glyph="{StaticResource GlyphClose}"/>
                                </telerik:RadButton>
                            </StackPanel>
                            <Border x:Name="PART_ClientAreaBorder" Grid.Column="1" Grid.Row="1" Margin="0 12 0 0" Background="{TemplateBinding Background}"/>
                            <AdornerDecorator x:Name="Adorner" Grid.Column="1" Grid.RowSpan="2">
                                <ContentPresenter Canvas.ZIndex="0" Name="PART_RootContentPresenter"/>
                            </AdornerDecorator>
                            <ResizeGrip x:Name="WindowResizeGrip"
                            Grid.Row="1"
                            Grid.Column="1"
                            shell:WindowChrome.ResizeGripDirection="BottomRight"
                            HorizontalAlignment="Right"
                            VerticalAlignment="Bottom"
                            Visibility="Collapsed"
                            IsTabStop="False"/>
                        </Grid>
                        <Border Background="{x:Null}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}"/>
                    </Grid>
                </Border>
                <ControlTemplate.Triggers>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="Window.ResizeMode" Value="CanResizeWithGrip"/>
                            <Condition Property="Window.WindowState" Value="Normal"/>
                        </MultiTrigger.Conditions>
                        <Setter TargetName="WindowResizeGrip" Property="Visibility" Value="Visible"/>
                    </MultiTrigger>
                    <Trigger Property="Window.ResizeMode" Value="NoResize">
                        <Setter TargetName="minimizeButton" Property="Visibility" Value="Collapsed"/>
                        <Setter TargetName="maximizeButton" Property="Visibility" Value="Collapsed"/>
                    </Trigger>
                    <Trigger Property="Window.ResizeMode" Value="CanMinimize">
                        <Setter TargetName="maximizeButton" Property="IsEnabled" Value="False"/>
                    </Trigger>
                    <Trigger Property="WindowState" Value="Maximized">
                        <Setter TargetName="MaximizeWindowDecorator" Property="Margin" Value="6"/>
                        <Setter TargetName="maximizeButton" Property="Content">
                            <Setter.Value>
                                <telerik:RadGlyph Glyph="{StaticResource GlyphWindowCollapse}"/>
                            </Setter.Value>
                        </Setter>
                        <Setter Property="CornerRadius" Value="0"/>
                    </Trigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="telerik:RadRibbonWindow.IsAutoHideTaskbar" Value="true"/>
                            <Condition Property="Window.WindowState" Value="Maximized"/>
                        </MultiTrigger.Conditions>
                        <Setter TargetName="MaximizeWindowDecorator" Property="Margin" Value="-7 -2 -7 -6"/>
                    </MultiTrigger>
                    <Trigger Property="IsTitleVisible" Value="False">
                        <Setter TargetName="WindowTitle" Property="Visibility" Value="Collapsed"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>