Added DashLineCap, StartLineCap, EndLineCap to the Shape. Fixed properties assignment order in Pen constructor.

src/Perspex.Controls/Shapes/Shape.cs

@@ -90,13 +90,20 @@ namespace Perspex.Controls.Shapes
             set { SetValue(StrokeThicknessProperty, value); }
         }
 
+        public PenLineCap DashCap { get; set; } = PenLineCap.Flat;
+
+        public PenLineCap StartLineCap { get; set; } = PenLineCap.Flat;
+
+        public PenLineCap EndLineCap { get; set; } = PenLineCap.Flat;
+
         public override void Render(DrawingContext context)
         {
             var geometry = RenderedGeometry;
 
             if (geometry != null)
             {
-                var pen = new Pen(Stroke, StrokeThickness, new DashStyle(StrokeDashArray));
+                var pen = new Pen(Stroke, StrokeThickness, new DashStyle(StrokeDashArray), 
+                    DashCap, StartLineCap, EndLineCap);
                 context.DrawGeometry(Fill, pen, geometry);
             }
         }

src/Perspex.SceneGraph/Media/Pen.cs

@@ -31,12 +31,12 @@ namespace Perspex.Media
         {
             Brush = brush;
             Thickness = thickness;
+            DashCap = dashCap;
             StartLineCap = startLineCap;
             EndLineCap = endLineCap;
             LineJoin = lineJoin;
             MiterLimit = miterLimit;
             DashStyle = dashStyle;
-            DashCap = dashCap;
         }
 
         /// <summary>