/// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);
            camera      = new RTSCamera();
            camera.Initialize();
            ground = new Ground();
            children.Add(camera);
            children.Add(ground);

            font = Content.Load <SpriteFont>("SpriteFont1");

            foreach (GameEntity gameEntity in children)
            {
                gameEntity.LoadContent();
            }
            // TODO: use this.Content to load your game content here
        }
        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);
            camera = new RTSCamera();
            camera.Initialize();
            ground = new Ground();
            children.Add(camera);
            children.Add(ground);

            font = Content.Load<SpriteFont>("SpriteFont1");

            foreach (GameEntity gameEntity in children)
            {
                gameEntity.LoadContent();
            }
            // TODO: use this.Content to load your game content here
        }