modernkeepass/ModernKeePass/Views/UserControls/SymbolPickerUserControl.xaml

<UserControl x:Name="UserControl"
    x:Class="ModernKeePass.Views.UserControls.SymbolPickerUserControl"
    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"
    mc:Ignorable="d">
    <ComboBox 
        x:Name="ComboBox" 
        ItemsSource="{Binding Symbols, ElementName=UserControl}" 
        SelectedItem="{Binding SelectedSymbol, ElementName=UserControl, Mode=TwoWay}" 
        Loaded="ComboBox_OnLoaded">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <Border>
                    <SymbolIcon Symbol="{Binding}" />
                </Border>
            </DataTemplate>
        </ComboBox.ItemTemplate>
    </ComboBox>
</UserControl>