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  4. Create a simple polyline, a closed polyline And a Sine curve in code
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Polylines" Height="340" Width="250">
  
    
      
              Points="10 170,160 110,10 160,60 110,210 170" />
      
              Points="10 710,160 10,110 160,160 10,210 70, 0 70" />
      
      
    
  

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;
namespace WpfApplication1
{
    public partial class Polylines : Window
    {
        public Polylines()
        {
            InitializeComponent();
            for (int i = 0; i < 70; i++)
            {
                double x = i * Math.PI;
                double y = 40 + 30 * Math.Sin(x / 10);
                polyline1.Points.Add(new Point(x, y));
            }
        }
    }
}