public ICollector Merge(ICollector coll)
            {
                if (!this.IsMergeable(coll))
                    throw new InvalidProgramException("Algorithmic error");

                IImageProvider ic = coll as IImageProvider;

                if (ic != null)
                {
                    List<string> Images = new List<string>(_ListImage);
                    Images.AddRange(ic.Image);
                    return new ImageCollector(Images);
                }

                return coll.Merge(this);
            }