public class MapContentReader : ContentTypeReader<Lib.Map>
        {
            protected override Map Read(
                    ContentReader input,
                    Map existingInstance)
            {

                Map map = existingInstance;

                if (map == null)
                {
                    map = new Map();
                }

                map.filename = input.ReadString();
                map.numberOfLayers = input.ReadInt32();
                map.mapWidth = input.ReadInt32();
                map.mapHeight = input.ReadInt32();
                map.Map_Data = input.ReadString();
                map.Number_Of_Anim_Tiles = input.ReadInt32();

                map.Animated_Tiles = input.ReadObject<List<AnimatedTiles>>();              
                
                return map;
            }
        }

//AnimatedTiles Class
    public class AnimatedTiles
    {
        #region Fields
        private int positionX;
        private int positionY;
        private string ID;
        #endregion

        #region Public Methods
        public int PositionX
        {
            get { return positionX; }
            set { positionX = value; }
        }

        public int PositionY
        {
            get { return positionY; }
            set { positionY = value; }
        }

        public string Type
        {
            get { return ID; }
            set { ID = value; }
        }
        #endregion

        public AnimatedTiles() { }

        public AnimatedTiles(int X, int Y, string tileID)
        {
            positionX = X;
            positionY = Y;
            ID = tileID;
        }
    }
}