Retail_manager/RMWPFUserInterface/Views/ShellView.xaml

<Window x:Class="RMWPFUserInterface.Views.ShellView"
        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:local="clr-namespace:RMWPFUserInterface.Views"
        mc:Ignorable="d"
        Title="ShellView" Height="600" Width="1000">
    <DockPanel>
        <Menu DockPanel.Dock="Top" FontSize="18">
            <MenuItem Header="_File">
                <MenuItem x:Name="ExitApplication" Header="E_xit"/>
            </MenuItem>
            <MenuItem Header="_Users">
                <MenuItem x:Name="UserManagement" Header="User_Management"/>
            </MenuItem>
            <MenuItem Header="_Account"  Visibility="{Binding IsLoggedIn, Converter={StaticResource BooleanToVisibilityConverter}, FallbackValue=Collapsed}">
                <MenuItem x:Name="LogOut" Header="_Log Out"/>
            </MenuItem>
        </Menu>
        <Grid>
            <ContentControl x:Name="ActiveItem" Margin="20 5 20 20" />
        </Grid>
    </DockPanel>
</Window>