<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WPF" Height="270" Width="300" Loaded="Window_Loaded"> <Canvas> <TextBlock Canvas.Top="40" Canvas.Left="20" FontSize="14" Text="Static Points Collection" /> <Polyline Stroke="Black" StrokeThickness="3" Points="0,0 300,10 300,10 10,10 10,25 250,250 255,85 250,40 205,85 200,40 155,85 35,90" /> <TextBlock Canvas.Top="150" Canvas.Left="20" Text="Programmatic Points Collection" /> <Polyline Name="plLine" Stroke="Black" StrokeThickness="3" /> </Canvas> </Window> //File:Window.xaml.cs using System.Windows; namespace WpfApplication1 { public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { plLine.Points.Add(new Point(10, 140)); plLine.Points.Add(new Point(270, 140)); plLine.Points.Add(new Point(10, 175)); plLine.Points.Add(new Point(10, 220)); plLine.Points.Add(new Point(125, 220)); } } }