MonoGame_AdMobCrash_Game1.cs

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input.Touch;
using System;

namespace AdMobTest
{
    public interface IAdProvider
    {
        bool AdReady { get; }
        void ShowAd();
    }

    /// <summary>
    /// This is the main type for your game.
    /// </summary>
    public class Game1 : Game
    {
        private GraphicsDeviceManager _graphics;
        private SpriteBatch _spriteBatch;
        private Texture2D _pixel;
        private Rectangle _buttonRect = new Rectangle(100, 100, 500, 300);
        private bool _isTouched = false;
        private IAdProvider _adProvider;

        public Game1(IAdProvider adProvider)
        {
            _adProvider = adProvider ?? throw new ArgumentNullException();

            _graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";

            _graphics.IsFullScreen = true;
            _graphics.PreferredBackBufferWidth = 1280;
            _graphics.PreferredBackBufferHeight = 720;
            _graphics.SupportedOrientations = DisplayOrientation.LandscapeLeft | DisplayOrientation.LandscapeRight;
        }

        /// <summary>
        /// Allows the game to perform any initialization it needs to before starting to run.
        /// This is where it can query for any required services and load any non-graphic
        /// related content.  Calling base.Initialize will enumerate through any components
        /// and initialize them as well.
        /// </summary>
        protected override void Initialize()
        {
            // TODO: Add your initialization logic here

            base.Initialize();
        }

        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            _spriteBatch = new SpriteBatch(GraphicsDevice);

            // TODO: use this.Content to load your game content here
            _pixel = new Texture2D(_graphics.GraphicsDevice, 1, 1);
            _pixel.SetData<Color>(new Color[] { Color.White });
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// game-specific content.
        /// </summary>
        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

        /// <summary>
        /// Allows the game to run logic such as updating the world,
        /// checking for collisions, gathering input, and playing audio.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Update(GameTime gameTime)
        {
            bool wasTouched = _isTouched == true;
            _isTouched = false;
            foreach (var touch in TouchPanel.GetState())
            {
                _isTouched = _buttonRect.Contains(touch.Position);

                if (_isTouched == true)
                    break;
            }

            if (wasTouched && !_isTouched)
            {
                _adProvider.ShowAd();
            }

            base.Update(gameTime);
        }

        /// <summary>
        /// This is called when the game should draw itself.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            // TODO: Add your drawing code here

            base.Draw(gameTime);

            Color mask = Color.Red;
            if (_adProvider.AdReady == true)
            {
                mask = (_isTouched) ? Color.Green : Color.LightGreen;
            }

            _spriteBatch.Begin();
            _spriteBatch.Draw(_pixel, _buttonRect, mask);
            _spriteBatch.End();
        }
    }
}