Store and recall int-arrays in xamarin-forms

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ListView

Xamarin

In my application I have multiple Array lists, (more than 20 in my case), trying to find a way to store them somewhere and call them back if possible, like in Modules in VB.

Here is my code

Models Class

public class Contacts
{
    [PrimaryKey][AutoIncrement]
    public int Contact_ID { get; set; }
    public string Contact_Name { get; set; }
    public string Contact_Address { get; set; }
    public string Contact_eMail { get; set; }
}

Main Page

public partial class MainPage : ContentPage
{
    readonly SQLiteAsyncConnection _connection 
        = DependencyService.Get<ISQLite>().GetConnection();

    public MainPage()
    {
        InitializeComponent();
        this.BindingContext = this;
    }

    protected override void OnAppearing()
    {
        base.OnAppearing();

        // I have more than 20 This type of Array Lists, and some contains 
        more than 30 items 
        
        int[] intArray;
        intArray = new int[4];
        intArray[0] = 13;
        intArray[1] = 14;
        intArray[2] = 18;
        intArray[3] = 21;

        var list = _connection.Table<Contacts>().ToListAsync().Result;
        var myAL = new ArrayList();
        foreach (int rowList in intArray)
        {
            var NewItem = list.Where(x => x.Contact_ID.Equals(rowList));
            myAL.Add(NewItem.FirstOrDefault());
        }

        listView.ItemsSource = myAL;
    }
}

XAML Page

<StackLayout>
    <ListView x:Name="listView" HasUnevenRows="True"  IsVisible="True">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <StackLayout Orientation="Vertical" VerticalOptions="CenterAndExpand">
                        <Frame BackgroundColor="LightYellow">
                            <StackLayout Orientation="Vertical" VerticalOptions="Center" >
                                <Label Text="{Binding Contact_Name}" HorizontalOptions="StartAndExpand" TextColor="Black" FontSize="Medium"></Label>
                                <Label Text="{Binding Contact_Address}" HorizontalOptions="StartAndExpand" TextColor="Black" FontSize="Medium"></Label>
                                <Label Text="{Binding Contact_eMail}" HorizontalOptions="StartAndExpand" TextColor="Black" FontSize="Medium"></Label>
                            </StackLayout>
                        </Frame>
                    </StackLayout>
                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</StackLayout>

What I have tried:

Need to display selective contacts from DB file using intArray lists