I found a small bug when creating a shape:

            var = new RRS MindFusion.Diagramming.Silverlight.Shape (
                ElementTemplate new []
(
new ArcTemplate (3, 3, 94, 94, 0, 360, Color.Red, 1)
),
                            ElementTemplate new []
(
new ArcTemplate (15, 15, 70, 70, 0, 360, Color.Blue, 3)
),
                null, FillRule.Nonzero, "bpmnIntermediate");


Not respect either the color or the width of ElementTemplate.