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    copied!<p>You can create a List of Border, take the first and last Border from your List and apply a corner radius.</p> <p>XAML:</p> <pre><code>&lt;Window x:Class="TestWpf.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:TestWpf="clr-namespace:TestWpf" Title="MainWindow" Height="350" Width="525"&gt; &lt;Window.Resources&gt; &lt;TestWpf:AchievedConverter x:Key="AchievedConverter"/&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;ListBox Name="listBox" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ItemsSource="{Binding Bars}"&gt; &lt;ListBox.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;WrapPanel IsItemsHost="True" /&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ListBox.ItemsPanel&gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;Border Height="10" CornerRadius="{Binding Corner}" Width="{Binding Width}" Background="{Binding IsAchieved, Converter={StaticResource AchievedConverter}}"/&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>C#:</p> <pre><code>/// &lt;summary&gt; /// Interaction logic for MainWindow.xaml /// &lt;/summary&gt; public partial class MainWindow : Window { private ObservableCollection&lt;Bar&gt; _bars; public MainWindow() { InitializeComponent(); this.DataContext = this; _bars = new ObservableCollection&lt;Bar&gt;(); //Init _bars.Add(new Bar {Width = 20, IsAchieved = true, Corner = new CornerRadius(5, 0, 0, 5)}); _bars.Add(new Bar {Width = 60, IsAchieved = true}); _bars.Add(new Bar {Width = 80, IsAchieved = true}); _bars.Add(new Bar {Width = 20, IsAchieved = false}); _bars.Add(new Bar {Width = 50, IsAchieved = false, Corner = new CornerRadius(0, 5, 5, 0)}); } public ObservableCollection&lt;Bar&gt; Bars { get { return _bars; } } } public class Bar { public double Width { get; set; } public bool IsAchieved { get; set; } public CornerRadius Corner { get; set; } } public class AchievedConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if ((bool)value) return new SolidColorBrush(Colors.Green); else return new SolidColorBrush(Colors.Red); } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } } </code></pre> <p><img src="https://i.stack.imgur.com/3lOsp.png" alt="enter image description here"></p>
 

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