aistudio-wpf-diagram/Fluent.Ribbon/Fluent.Ribbon.Showcase/TestWindow.xaml

<Fluent:RibbonWindow xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:Fluent="clr-namespace:Fluent;assembly=Fluent"
                     xmlns:FluentTest="clr-namespace:FluentTest"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                     mc:Ignorable="d"
                     x:Name="window"
                     x:Class="FluentTest.TestWindow"
                     Title="{Binding WindowTitle, ElementName=TestContent}"
                     FlowDirection="LeftToRight"
                     Height="768"
                     Width="1024"
                     MinWidth="80"
                     MinHeight="60"                     
                     WindowState="Normal"
                     Style="{StaticResource RibbonWindowStyle}"
                     DataContext="{Binding DataContext, ElementName=TestContent}">
    <Fluent:RibbonWindow.LayoutTransform>
        <!-- todo: netcore => was using x:Reference before -->
        <ScaleTransform ScaleX="{Binding DataContext.Zoom, ElementName=TestContent}"
                        ScaleY="{Binding DataContext.Zoom, ElementName=TestContent}" />
    </Fluent:RibbonWindow.LayoutTransform>
    <Fluent:RibbonWindow.WindowCommands>
        <Fluent:WindowCommands>
            <Button Content="Test" Style="{DynamicResource Fluent.Ribbon.Styles.WindowCommands.Button}" />
        </Fluent:WindowCommands>
    </Fluent:RibbonWindow.WindowCommands>
    <FluentTest:TestContent x:Name="TestContent" />
</Fluent:RibbonWindow>