DivInputControl.xaml

<UserControl x:Class="Leosac.KeyManager.Library.UI.DivInputControl"
             x:Name="userControl"
             xmlns="http:https://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http:https://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http:https://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http:https://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:Leosac.KeyManager.Library.UI"
             xmlns:materialDesign="http:https://materialdesigninxaml.net/winfx/xaml/themes"
             xmlns:properties="clr-namespace:Leosac.KeyManager.Library.UI.Properties"
             mc:Ignorable="d" 
             d:DesignHeight="150" d:DesignWidth="400">
    <materialDesign:Card>
        <Expander Header="{x:Static properties:Resources.DivInput}">
            <StackPanel>
                <TextBlock Text="{x:Static properties:Resources.DivInputHelper}" Margin="5" />
                <ListBox x:Name="fragments" ItemsSource="{Binding DivInput, ElementName=userControl}" MaxWidth="500" ScrollViewer.HorizontalScrollBarVisibility="Auto" Margin="5">
                    <ListBox.ItemsPanel>
                        <ItemsPanelTemplate>
                            <WrapPanel IsItemsHost="True" Orientation="Horizontal"></WrapPanel>
                        </ItemsPanelTemplate>
                    </ListBox.ItemsPanel>
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <materialDesign:Chip Content="{Binding}"
                                 IsDeletable="True"
                                 DeleteClick="RemoveFragmentClick"
                                 Click="EditFragmentClick"
                                 Margin="0 0 4 4" />
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
                <materialDesign:DialogHost Identifier="fragmentDialog" CloseOnClickAway="True" DialogTheme="Inherit" />
                <WrapPanel>
                    <ComboBox Width="200" Margin="5"
                              materialDesign:HintAssist.Hint="{x:Static properties:Resources.AddDivInputFragment}"
                              ItemsSource="{Binding FragmentTypes, ElementName=userControl}"
                              SelectedItem="{Binding SelectedFragmentType, ElementName=userControl}"
                              Style="{StaticResource MaterialDesignOutlinedComboBox}">
                        <ComboBox.ItemTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Name}" />
                            </DataTemplate>
                        </ComboBox.ItemTemplate>
                    </ComboBox>
                    <Button Content="{materialDesign:PackIcon Kind=Plus,Size=24}" Click="AddFragment_Click" Margin="5" />
                </WrapPanel>
            </StackPanel>
        </Expander>
    </materialDesign:Card>
</UserControl>