public static void DrawPolygon(this DrawingContext dc, IEnumerable <Point> points, Brush brush = null, Pen pen = null)
{
var drawing = new DrawingGroup();
points = points.ToList();
if (!points.Any())
{
return;
}
pen = pen ?? DefaultPen;
using (var groupdc = drawing.Open())
{
var streamGeometry = new StreamGeometry();
using (var geometryContext = streamGeometry.Open())
{
geometryContext.BeginFigure(points.First(), true, true);
geometryContext.PolyLineTo(points.Skip(1).ToList(), true, true);
}
var outlinedGeom = streamGeometry.GetOutlinedPathGeometry();
groupdc.DrawGeometry(brush, pen, outlinedGeom);
}
dc.DrawDrawing(drawing);
}