Monogame: trying to add new levels and abilities to my pong game

I have two problems with my code, check the code down below, so you understand which section i'm talking about!

Problem 1 - adding new levels:

I'm trying to add new block levels when "block = null", you know when all my blocks are destroyed by the ball. I want it to start a new level with a different block path. But my code "if (block.Count == 0)" doesn't work.

Problem 2 - adding abilities to random block:

I'm gonna add some abilities to random blocks, u know that drops down when you hit a random block. Like you get 2 balls or bigger paddle or slower ball speed. I know I need to create a new list and then add different blocks with different abilities. But I don't know how to write the code block that chooses a random block and adding a ability to that block. That drops down so I can take it with the paddle.

(Sorry about my bad english)

• poang = points
• linje = line
• liv = lives
• boll = ball
• poang = points
• blockröd = blockred

• blockgrön = blockgreen

  public class Game1 : Game
  {
  GraphicsDeviceManager graphics;
  SpriteBatch spriteBatch;
  SpriteFont spritefont;
  Texture2D linje_texture;
  Texture2D boll_texture;
  Texture2D blockröd_texture;
  Texture2D blockgrön_texture;
  Texture2D gameover_texture;
  Rectangle linje_rect;
  Rectangle boll_rect;
  Rectangle blockröd_rect;
  Rectangle blockgrön_rect;
  Rectangle gameover_rect;
  
  Vector2 linje_speed;
  Vector2 boll_speed;
  
  Random random;
  
  StreamReader sr;
  StreamWriter sw;
  
  int liv = 3;
  int poang = 0;
  int highscore;
  int raknare = 0;
  int sek = 0;
  
  List<Rectangle> block = new List<Rectangle>();
  List<Rectangle> block2 = new List<Rectangle>();
  
  bool Start = false;
  bool holdingleft = false;
  bool holdingright = false;
  bool resetballspeed = false;
  
  public Game1()
  {
      graphics = new GraphicsDeviceManager(this);
      Content.RootDirectory = "Content";
  
      graphics.PreferredBackBufferWidth = 760; 
      graphics.PreferredBackBufferHeight = 620; 
  }
  
  protected override void Initialize()
  {
      random = new Random();
      linje_speed.X = 6f;
      boll_speed.X = random.Next(-1, 1); 
      boll_speed.Y = 7f;
  
      sr = new StreamReader("highscore.txt");
      highscore = int.Parse(sr.ReadLine());
      sr.Close();
  
      base.Initialize();
  }
  
  protected override void LoadContent()
  {
      spriteBatch = new SpriteBatch(GraphicsDevice);
      spritefont = Content.Load<SpriteFont>("Fonts/Myfont");
      linje_texture = Content.Load<Texture2D>("Pics/linje");
      boll_texture = Content.Load<Texture2D>("Pics/boll");
      blockgrön_texture = Content.Load<Texture2D>("Pics/block-grön");
      blockröd_texture = Content.Load<Texture2D>("Pics/block-röd");
      gameover_texture = Content.Load<Texture2D>("Pics/GameOver");
      linje_rect = new Rectangle((Window.ClientBounds.Width - linje_texture.Width) / 2, 580, linje_texture.Width, linje_texture.Height);
      boll_rect = new Rectangle((Window.ClientBounds.Width - boll_texture.Width) / 2, 556, boll_texture.Width, boll_texture.Height);
      gameover_rect = new Rectangle((Window.ClientBounds.Width / 2) - (gameover_texture.Width / 2), (Window.ClientBounds.Height / 2) - gameover_texture.Height / 2, gameover_texture.Width, gameover_texture.Height);
  
      block.Add(blockgrön_rect);
      block2.Add(blockröd_rect);
      for (int i = 1; i < 2; i++)
      {
          for (int g = 1; g < 13; g++)
          {
              block2.Add(new Rectangle((g * 63) - 60, (i * 40), blockröd_texture.Width, blockröd_texture.Height));
          }
      }
      for (int i = 1; i < 2; i++)
      {
          for (int g = 1; g < 13; g++)
          {
              block.Add(new Rectangle((g * 63) - 60, (i * 20) + 40, blockgrön_texture.Width, blockgrön_texture.Height));
          }
      }
      // TODO: use this.Content to load your game content here
  }
  
  protected override void UnloadContent()
  {
      // TODO: Unload any non ContentManager content here
  }
  
  protected override void Update(GameTime gameTime)
  {
      if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
          Exit();
  
      if (Start == true)
      {
          boll_rect.X += (int)boll_speed.X; 
          boll_rect.Y += (int)boll_speed.Y; 
      }
  
      if (Start == false) 
      {
          boll_rect.X = linje_rect.X + ((linje_rect.Width / 2) - (boll_texture.Width / 2)); 
      }
      if (boll_rect.X > Window.ClientBounds.Width - boll_texture.Width || boll_rect.X < 0) 
          boll_speed.X *= -1;
  
      if (boll_rect.Y > Window.ClientBounds.Height - boll_texture.Height || boll_rect.Y < 0) 
          boll_speed.Y *= -1;
  
      if (boll_rect.Y > Window.ClientBounds.Height - boll_texture.Height) 
      {
          liv -= 1;
          Start = false;
          boll_rect.X = (Window.ClientBounds.Width - boll_texture.Width) / 2; 
          boll_rect.Y = 556; 
          linje_rect.X = (Window.ClientBounds.Width - linje_texture.Width) / 2; 
          linje_rect.Y = 580; 
      }
  
      KeyboardState ks = Keyboard.GetState();
      if (ks.IsKeyDown(Keys.Left)) 
      {
          linje_rect.X -= (int)linje_speed.X; 
          holdingleft = true;
      }
      else if (ks.IsKeyDown(Keys.Right)) 
      {
          linje_rect.X += (int)linje_speed.X;
          holdingright = true;
      }
      else if (ks.IsKeyDown(Keys.Space)) 
      {
          Start = true;
      }
      else if (ks.Equals(new KeyboardState()))
      {
          resetballspeed = true;
      }
  
      if (linje_rect.X > Window.ClientBounds.Width - linje_rect.Width) 
          linje_rect.X = (Window.ClientBounds.Width - linje_rect.Width);
  
      if (linje_rect.X < 0) 
          linje_rect.X = 0;
  
      if (linje_rect.Intersects(boll_rect)) 
      {
          boll_speed.Y *= -1;
          boll_rect.Y += (int)boll_speed.Y;
          if (holdingleft == true)
          {
              boll_speed.X -= 3;
          }
          else if (holdingright == true)
          {
              boll_speed.X += 3;
          }
          else if (resetballspeed == true)
          {
              boll_speed.X = 1;
          }
      }
  
      if (poang == highscore)
      {
          sw = new StreamWriter("highscore.txt");
          sw.WriteLine(poang);
          sw.Close();
      }
  
      for (int j = 1; j < block.Count; j++) 
      {
          if (boll_rect.Intersects(block[j])) 
          {
              boll_speed.Y *= -1;
              poang += 1;
              block.RemoveAt(j); 
              if (poang > 9)
              {
                  linje_rect.Width = 60;
              }
              if (poang > highscore)
              {
                  highscore = poang;
              }
          }
      }
  
      for (int k = 1; k < block2.Count; k++) 
      {
          if (boll_rect.Intersects(block2[k])) 
          {
              boll_speed.Y *= -1;
              poang += 5;
              if (poang > highscore)
              {
                  highscore = poang;
              }
              block2.RemoveAt(k);
          }
      }
  
      holdingleft = false;
      holdingright = false;
  
      raknare++;
  
      if (raknare == 60)
      {
          sek++;
          raknare = 0;
      }
      base.Update(gameTime);
  }
  
  protected override void Draw(GameTime gameTime)
  {
      GraphicsDevice.Clear(Color.Black);
  
      // TODO: Add your drawing code here
      spriteBatch.Begin();
      if (liv > 0)
      {
          spriteBatch.Draw(boll_texture, boll_rect, Color.White);
          spriteBatch.Draw(linje_texture, linje_rect, Color.White);
          spriteBatch.DrawString(spritefont, "Lives left: " + liv, Vector2.Zero, Color.White);
          spriteBatch.DrawString(spritefont, "Points: " + poang, new Vector2(350, 0), Color.White);
          spriteBatch.DrawString(spritefont, "Timer: " + sek, new Vector2(350, 600), Color.White);
          spriteBatch.DrawString(spritefont, "Highscore: " + highscore, new Vector2(660, 0), Color.White);
          foreach (Rectangle g in block)
          {
              spriteBatch.Draw(blockgrön_texture, g, Color.White);
          }
          foreach (Rectangle t in block2)
          {
              spriteBatch.Draw(blockröd_texture, t, Color.White);
          }
      }
      else if ((block.Count == 0) && (block.Count == 0))
          {
              gonna write out new blocks here
          }
      else if (liv == 0)
      {
          spriteBatch.Draw(gameover_texture, gameover_rect, Color.White);
      }
      spriteBatch.End();
  
      base.Draw(gameTime);
  }
  }
  
  

Code blocks i'm having trouble with (problem 1):

    else if ((block.Count == 0) && (block.Count == 0))
    {
         gonna write out new blocks here
    }

Code blocks i'm having trouble with (problem 2):

        for (int j = 1; j < block.Count; j++) 
        {
            if (boll_rect.Intersects(block[j])) 
            {
                boll_speed.Y *= -1;
                poang += 1;
                block.RemoveAt(j); 
                if (poang > 9)
                {
                    linje_rect.Width = 60;
                }
                if (poang > highscore)
                {
                    highscore = poang;
                }
            }
        }

        for (int k = 1; k < block2.Count; k++) 
        {
            if (boll_rect.Intersects(block2[k])) 
            {
                boll_speed.Y *= -1;
                poang += 5;
                if (poang > highscore)
                {
                    highscore = poang;
                }
                block2.RemoveAt(k);
            }
        }