GameManager Impl

public class GameManager : DrawableGameComponent, IGameManager
{
    Texture2D texture;
    SpriteFont font;

    public GameManager(Game game)
        : base(game)
    {

    }

    protected override void LoadContent()
    {
        base.LoadContent();

        texture = Game.Content.Load<Texture2D>("whiteQuad");
        font = Game.Content.Load<SpriteFont>("sysFont");
    }

    public Terrain Terrain { get; private set; }

    public void BuildTerrain()
    {
        Terrain = new Terrain();
        Terrain.BuildMap(Game.GraphicsDevice);
    }
}