UWP - ComboBox item style example

MainPage.xaml

<Page
    x:Class="UniversalAppTutorials.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UniversalAppTutorials"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
    <StackPanel 
        x:Name="stack_panel1" 
        Orientation="Horizontal"
        Background="Azure"
        Padding="125"
        >
        <ComboBox 
            x:Name="ComboBox1" 
            Header="Select A Color"
            Foreground="Crimson"
            FontSize="22"
            FontFamily="MV Boli"
            >
        </ComboBox>
    </StackPanel>
</Page>

MainPage.xaml.cs

using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
using Windows.UI;
using Windows.UI.Xaml;
using Windows.UI.Text;


namespace UniversalAppTutorials
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();

            // Initialize a new string array
            string[] colors = {
                "AntiqueWhite",
                "Green",
                "Orange",
                "DarkOliveGreen",
                "Cornsilk",
                "Cyan",
                "BlanchedAlmond",
                "Beige",
                "CornflowerBlue"
            };

            // Get the ComboBox item collection
            ItemCollection ic = ComboBox1.Items;

            // Loop through the array items
            for (int index = 0; index < colors.Length; index++)
            {
                // Initialize a new ComboBoxItem instance
                ComboBoxItem item = new ComboBoxItem();

                // Add the content to item
                item.Content = colors[index];

                // Set the item border as item separator
                item.BorderThickness = new Thickness(0, 0, 0, 2);
                item.BorderBrush = new SolidColorBrush(Colors.DarkBlue);

                // Item text style
                item.FontSize = 22;
                item.FontWeight = FontWeights.Medium;
                item.FontStretch = FontStretch.ExtraExpanded;
                item.FontFamily = new FontFamily("MV Boli");
                item.Padding = new Thickness(15, 10, 50, 10);
                item.Foreground = new SolidColorBrush(Colors.Navy);

                // Set the item width
                item.Width = 300;

                if (index % 2 == 0)
                {
                    // Set the regular item background
                    item.Background = new SolidColorBrush(Colors.CornflowerBlue);
                }
                else
                {
                    // Set the alternate item background
                    item.Background = new SolidColorBrush(Colors.SkyBlue);
                }

                // Finally, add the item to the ComboBox item collection
                ic.Add(item);
            }
        }
    }
}