adcontrolrenderer.cs

using System;
using Xamarin.Forms;
using Xamarin.Forms.Platform.UWP;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Advertising.Ads;
using Microsoft.Advertising.WinRT.UI;
using Windows.System.Profile;

[assembly: ExportRenderer(typeof(PluginsForXamarin.Controls.AdControlView), typeof(PluginsForXamarin.UWP.PlatformSpecific.AdViewRenderer))]
namespace PluginsForXamarin.UWP.PlatformSpecific 
{ 
    public class AdViewRenderer : ViewRenderer<Controls.AdControlView, AdControl> 
    { 
        string bannerId = "test"; 
        AdControl adView;
        string applicationID = "3f83fe91-d6be-434d-a0ae-7351c5a997f1";
        void CreateNativeAdControl() 
        { 
            if (adView != null) 
                return;

            var width = 300;
            var height = 50;
            if(AnalyticsInfo.VersionInfo.DeviceFamily == "Windows.Desktop")
            {
                width = 728;
                height = 90;
            }
            // Setup your BannerView, review AdSizeCons class for more Ad sizes. 
            adView = new AdControl
            {
                ApplicationId = applicationID,
                AdUnitId = bannerId,
                HorizontalAlignment = Windows.UI.Xaml.HorizontalAlignment.Center,
                VerticalAlignment = Windows.UI.Xaml.VerticalAlignment.Bottom,
                Height = height,
                Width = width
            };
           
        } 

        protected override void OnElementChanged(ElementChangedEventArgs<Controls.AdControlView> e)
        {
            base.OnElementChanged(e); 
            if(Control == null) 
            {
                CreateNativeAdControl(); 
                SetNativeControl(adView); 
            }
        }
    }
}