How to Apply Full Rectangular Border to the .NET MAUI ComboBox?

This repository contains a sample explaining how to Change the Color of the Entire Border in .NET MAUI ComboBox on Windows and Android Platform

Customizing ComboBox Border

To customize the border color of the .NET MAUI ComboBox (SfComboBox) on Windows and Android platforms, you can create a full border effect by wrapping the ComboBox within a Border control and setting ShowBorder="False" on the ComboBox itself. This allows full control over the ComboBox border’s color, thickness, and shape. Here’s an example:

XAML

<ContentPage.Resources>
    <!-- Define a Style for the ComboBox Border -->
    <Style TargetType="Border" x:Key="ComboBoxBorderStyle">
        <Setter Property="Stroke" Value="Red"/>
        <Setter Property="StrokeThickness" Value="2"/>
        <Setter Property="StrokeShape" Value="RoundRectangle 5"/>
    </Style>
</ContentPage.Resources>

<StackLayout Padding="20">
    <!-- Wrap SfComboBox in a Border to customize its appearance -->
    <Border Style="{StaticResource ComboBoxBorderStyle}">
        <editors:SfComboBox  
                ShowBorder="False"
                Placeholder="Select Here">
            <editors:SfComboBox.ItemsSource>
                <x:Array Type="{x:Type x:String}">
                    <x:String>Uganda</x:String>
                    <x:String>Ukraine</x:String>
                    <x:String>United States</x:String>
                    <x:String>United Kingdom</x:String>
                    <x:String>Uzbekistan</x:String>
                </x:Array>
            </editors:SfComboBox.ItemsSource>
        </editors:SfComboBox>
    </Border>
</StackLayout>

Output: