/// <summary>コンストラクタ。</summary>
		public VirtualLayer()
			{
			Shapes = new VirtualShapeBaseCollection( this );
			DefaultShapeBorder = Pens.White;
			DefaultShapeFill = Brushes.White;
			Visible = true;
			}
 /// <summary>コンストラクタ。</summary>
 public VirtualLayer()
 {
     Shapes             = new VirtualShapeBaseCollection(this);
     DefaultShapeBorder = Pens.White;
     DefaultShapeFill   = Brushes.White;
     Visible            = true;
 }