MainWindow.xaml

<Window x:Class="Lab3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:view="clr-namespace:Lab3.View"       
        mc:Ignorable="d"
        Title="MyQuizApp" Height="1000" Width="1200">
    <Window.DataContext>
        <view:MainViewModel />
    </Window.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="40"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="20"/>
        </Grid.RowDefinitions>

        <ContentControl Name="Navbar"  Grid.Row="0" Content="{Binding NavbarView}" />

        <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto"
                      Margin="0,0,0,0">
            <ContentControl Name="ContentArea" Content="{Binding CurrentView}" />
        </ScrollViewer>
    </Grid>
</Window>