The frontend UI

ImageSelectionPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:CV="clr-namespace:CarouselView.FormsPlugin.Abstractions;assembly=CarouselView.FormsPlugin.Abstractions"
             xmlns:FFImage="clr-namespace:FFImageLoading.Forms;assembly=FFImageLoading.Forms"
             xmlns:FFImageCache="clr-namespace:FFImageLoading.Cache;assembly=FFImageLoading"
             mc:Ignorable="d"
             x:Class="MultiImagePicker.ImageSelectionPage">

    <ContentPage.Resources>
        <ResourceDictionary>
            <Style x:Key="CarouselViewStyle" TargetType="CV:CarouselViewControl">
                <Setter Property="ShowIndicators" Value="True" />
                <Setter Property="VerticalOptions" Value="FillAndExpand" />
                <Setter Property="HorizontalOptions" Value="FillAndExpand" />
                <Setter Property="AnimateTransition" Value="False" />
            </Style>

            <OnPlatform x:Key="cacheType" x:TypeArguments="FFImageCache:CacheType"
                    iOS="All"
                    Android="Memory"/>
            <OnPlatform x:Key="downsampleWidth" x:TypeArguments="x:Double"
                    iOS="576"
                    Android="896"/>
            <OnPlatform x:Key="imageHeight" x:TypeArguments="x:Double"
                        iOS="275"
                        Android="325"/>

            <Style x:Key="CarouselViewPictureStyle" TargetType="FFImage:CachedImage">
                <Setter Property="Source" Value="{Binding .}" />
                <Setter Property="IsOpaque" Value="True" />
                <Setter Property="InputTransparent" Value="False" />
                <Setter Property="CacheType" Value="{StaticResource cacheType}" />
                <Setter Property="Aspect" Value="AspectFill" />
                <Setter Property="DownsampleWidth" Value="{StaticResource downsampleWidth}" />
            </Style>
        </ResourceDictionary>
    </ContentPage.Resources>

    <ContentPage.Content>
        <StackLayout>
            <Label Text="Select Photos Page"
                   HorizontalOptions="CenterAndExpand"
                   TextColor="Black"
                   FontSize="Large"
                   FontAttributes="Bold" />
            <StackLayout>
                <Button Text="Select Images"
                        Clicked="SelectImagesButton_Clicked"></Button>
            </StackLayout>
            <!-- The CarouselView inside of a StackLayout. -->
            <StackLayout Margin="0,0,0,20" >
                <CV:CarouselViewControl x:Name="ImgCarouselView" Style="{StaticResource CarouselViewStyle}" HeightRequest="{StaticResource imageHeight}">
                    <CV:CarouselViewControl.ItemTemplate>
                        <DataTemplate>
                            <FFImage:CachedImage Style="{StaticResource CarouselViewPictureStyle}"/>
                        </DataTemplate>
                    </CV:CarouselViewControl.ItemTemplate>
                </CV:CarouselViewControl>
            </StackLayout> 
            <Button Text="Upload Images"
                    Clicked="UploadImagesButton_Clicked"></Button>
            <!-- InfoText is optional. -->
            <Label x:Name="InfoText"
                   IsVisible="False"
                   Text="Ready for Upload"
                   HorizontalOptions="CenterAndExpand"
                   TextColor="Black"
                   FontSize="Large"
                   FontAttributes="Bold" />
        </StackLayout>
    </ContentPage.Content>
</ContentPage>