WPF polygon rounded corners.

Question

I am drawing a simple pointer using the WPF polygon but I can't seem to get rounded corners on the five points using the following background code.

Polygon poly = new Polygon();

        poly.Points = new PointCollection();
        poly.Points.Add(new Point(0, 0));
        poly.Points.Add(new Point(12, 0));
        poly.Points.Add(new Point(17, 7));
        poly.Points.Add(new Point(12, 14));
        poly.Points.Add(new Point(0, 14));
        poly.StrokeLineJoin = PenLineJoin.Round;
        poly.StrokeStartLineCap = PenLineCap.Round;
        poly.StrokeEndLineCap = PenLineCap.Round;

It continually gives me sharp corners. Any help would be greatly appreciated.

Answer 1

I updated your code like below:

Polygon poly = new Polygon();  
            poly.Points = new PointCollection();  
            poly.Points.Add(new Point(0, 0));  
            poly.Points.Add(new Point(12, 0));  
            poly.Points.Add(new Point(17, 7));  
            poly.Points.Add(new Point(12, 14));  
            poly.Points.Add(new Point(0, 14));  
            poly.StrokeLineJoin = PenLineJoin.Round;  
            poly.StrokeStartLineCap = PenLineCap.Round;  
            poly.StrokeEndLineCap = PenLineCap.Round;  
  
            // Add below code  
            poly.StrokeThickness = 10;  
            poly.Stroke = Brushes.Red;  
  
            Thickness myThickness = new Thickness();  
            myThickness.Left = 50;  
            myThickness.Top = 50;  
            poly.Margin = myThickness;  
  

The result picture is:

Is this want you want? If I misunderstand your question, please point out.

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