public void checkBulletCollision(List<Bullet> bullets)
    {

       foreach (Bullet b in bullets)
            {
                if (BoundingBox.Intersects(b.BoundingBox))
                {
                    isAlive = false;
                    b.isVisible = false;
                    bullets.Remove(b);
                    break;
                }

            }




    }

public void UpdateBullets()
    {

        foreach (Bullet b in bullets)
        {
            b.position.X += 10;
            if (b.position.X > 1020)
                b.isVisible = false;
        }
        for (int i = 0; i < bullets.Count; i++)
        {
            if (!bullets[i].isVisible)
            {
                bullets.RemoveAt(i);
                i--;
            }
        }




    }

    public void Shoot()
    {

        Bullet newB = new Bullet(this);
        newB.LoadContent();
        newB.position = player1.position;
        newB.position.Y -= 10;
        newB.position.X += 10;
        newB.isVisible = true;

        if (bullets.Count < 1000)
            bullets.Add(newB);
    }

protected override void Update(GameTime gameTime)
    {
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
            Exit();

        // TODO: Add your update logic here
        float deltaTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
        controls.Update();
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
            Exit();



        //update all blocks in array
        for (int i = 0; i < blocks.Length; i++)
        {
            blocks[i].Update();
        }

        //block1.Update();
        //block2.Update();
        //block3.Update();
        //CheckCollisions();
        player1.Update(controls, gameTime, blocks);

        foreach (Zombie z in zombies)
        {
            if (z.isAlive)
            {

                z.Update(gameTime, blocks);

                z.getPlayerPosition(player1);
                z.checkBulletCollision(bullets);
            }

        }
        if (Keyboard.GetState().IsKeyDown(Keys.Space) && pastKey.IsKeyUp(Keys.Space))
        {
            Shoot();

        }

        UpdateBullets();

        pastKey = Keyboard.GetState();




        base.Update(gameTime);
    }