modernkeepass/Win10App/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"
        Height="35"
        Width="Auto"
        ItemsSource="{Binding Symbols, ElementName=UserControl}" 
        SelectedItem="{Binding SelectedSymbol, ElementName=UserControl, Mode=TwoWay}" 
        Loaded="ComboBox_OnLoaded" 
        ItemContainerStyle="{StaticResource MainColorComboBoxItem}" 
        Style="{StaticResource MainColorComboBox}">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal" Margin="0,0,10,0">
                    <SymbolIcon Symbol="{Binding}" />
                </StackPanel>
            </DataTemplate>
        </ComboBox.ItemTemplate>
    </ComboBox>
</UserControl>