Pong-1.1.cs

GraphicsDevice.Clear(Color.CornflowerBlue);

Pong-1.2.cs

GraphicsDevice.Clear(Color.Black);

Pong-1.3.cs

private int screenWidth;
private int screenHeight;

Pong-1.4.cs

screenWidth = 800;
screenHeight = 600;
graphics.PreferredBackBufferWidth = screenWidth;
graphics.PreferredBackBufferHeight = screenHeight;
graphics.ApplyChanges();

Pong-2.1cs

public Bat(ContentManager content, Vector2 screenSize, bool side)
{
	moveSpeed = 6;
	points = 0;
	texture = content.Load<Texture2D>("bat");
	size = new Rectangle(0, 0, texture.Width, texture.Height);
	if (side) position = new Vector2(30, screenSize.Y / 2 - size.Height / 2);
	else position = new Vector2(screenSize.X - 30 - size.Width, screenSize.Y / 2 - size.Height / 2);
	yHeight = (int)screenSize.Y;
}

Pong-2.2.cs

private Vector2 position;
private int moveSpeed;
private Rectangle size;
private int points;
private int yHeight;
private Texture2D texture;

Pong-2.3.cs

private Bat rightBat;
private Bat leftBat;

Pong-2.4.cs

rightBat = new Bat(Content, new Vector2(screenWidth, screenHeight), false);
leftBat = new Bat(Content, new Vector2(screenWidth, screenHeight), true);

Pong-2.5.cs

public void Draw(SpriteBatch batch)
{
	batch.Draw(texture, position, Color.White);
}