/// <summary>
/// Removes an <see cref="Asteroid"/> from <see cref="Asteroids"/> and
/// updates <see cref="Belt"/>.
/// </summary>
public void RemoveAsteroid(int index)
{
Asteroids.RemoveAt(index);
Belt.SetAsteroids(Asteroids.Select(c => c.ScreenObject).ToList());
}
/// <summary>
/// Adds a new <see cref="Asteroid"/> to <see cref="Asteroids"/> and
/// updates <see cref="Belt"/>.
/// </summary>
public void AddAsteroid(Asteroid asteroid)
{
Asteroids.Add(new CachedObject <Asteroid>(asteroid));
Belt.SetAsteroids(Asteroids.Select(c => c.ScreenObject).ToList());
}
