Hi,

You could use a compound pen to draw the double line. The extra texts could be implemented using attached nodes that follow the moved / resized triangle node:

DiagramNode TriangleWithLabels(RectangleF bounds)
{
	float xl = bounds.Left;
	float xr = bounds.Right;
	float xm = xl + 3f * bounds.Width / 5f;
	float yt = bounds.Top;
	float yb = bounds.Bottom;
	float ym = yt + 2f * bounds.Height / 5f;

	var triangle = diagram.Factory.CreateShapeNode(
		xl, ym, xm - xl, yb - ym - 2, Shapes.Merge);
	triangle.Brush = new MindFusion.Drawing.SolidBrush(Color.Transparent);
	triangle.ShadowBrush = triangle.Brush;
	triangle.Pen = new MindFusion.Drawing.Pen(Color.Black, 2f);
	triangle.Pen.CompoundArray = new[] { 0.0f, 0.1f, 0.9f, 1f };
	triangle.Text = "1";

	var topText = diagram.Factory.CreateShapeNode(
		xl, yt, xm - xl, ym - yt, Shapes.Rectangle);
	topText.Transparent = true;
	topText.EnabledHandles = AdjustmentHandles.None;
	// or .Locked = true
	topText.Text = "text";

	var bar = diagram.Factory.CreateShapeNode(
		xm + 1, yt, 2, bounds.Height, Shapes.Rectangle);
	bar.Brush = new MindFusion.Drawing.SolidBrush(Color.Black);
	bar.ShadowBrush = triangle.ShadowBrush;
	bar.EnabledHandles = AdjustmentHandles.None;
	// or .Locked = true

	var topRightText = diagram.Factory.CreateShapeNode(
		xm + 2, yt, xr - xm, ym - yt, Shapes.Rectangle);
	topRightText.Transparent = true;
	topRightText.EnabledHandles = AdjustmentHandles.None;
	// or .Locked = true
	topRightText.Text = "text";

	var bottomRightText = diagram.Factory.CreateShapeNode(
		xm + 2, ym, xr - xm, yb - ym, Shapes.Rectangle);
	bottomRightText.Transparent = true;
	bottomRightText.EnabledHandles = AdjustmentHandles.None;
	// or .Locked = true
	bottomRightText.Text = "text";

	topText.AttachTo(triangle, AttachToNode.TopRight);
	topRightText.AttachTo(triangle, AttachToNode.TopRight);
	bottomRightText.AttachTo(triangle, AttachToNode.BottomRight);

	bar.AttachTo(triangle,
		GroupAnchorStyles.Top | GroupAnchorStyles.Bottom | GroupAnchorStyles.Right);

	return triangle;
} 

If you prefer rendering all that in a single node object, you could custom-draw it with the System.Drawing API, either by using standard ShapeNode and handling DrawNode event, or in a custom class that overrides the DrawLocal method. That should also be possible to implement via a CompositeNode that contains ShapeComponents for triangle and bar, and TextComponents for the labels.

Regards,
Slavcho
Mindfusion