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    <p>After experimenting with this for a while, I've come up with a solution that satisfies my needs. I'll post it here for posterity. Hopefully it saves someone else the 6 hours or so I've spent on this issue.</p> <p>Couple classes I use that are defined elsewhere:</p> <ul> <li><strong>PlanarElement</strong>: Simply describes a 2d "thing" with a Boundary property exposing a Polygon and an Openings property exposing an IEnumerable list of Polygon objects</li> <li><strong>Polygon</strong>: 2d planar geometric class exposing a property of type IEnumerable of type Point</li> <li><strong>Point</strong>: 3d geometric point</li> </ul> <hr> <p>Here is the solution:</p> <p>1) Here is the ItemsControl to which my PlanarMembers will be bound</p> <pre><code>&lt;ItemsControl&gt; &lt;ItemsControl.Resources&gt; &lt;DataTemplate DataType="{x:Type o:PlanarMember}"&gt; &lt;Path Stroke="Black" StrokeThickness="1" Data="{Binding Converter={StaticResource PlanarMemberConverter}}"&gt; &lt;Path.Fill&gt; &lt;SolidColorBrush Opacity="0.5" Color="LightGray" /&gt; &lt;/Path.Fill&gt; &lt;/Path&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.Resources&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;Canvas RenderTransform="{StaticResource CurrentDisplayTransform}"/&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;/ItemsControl&gt; </code></pre> <p>2) Notice the use of PlanarMemberConverter in the Path's Data setting, created here:</p> <pre><code>&lt;this:PlanarMemberConverter x:Key="PlanarMemberConverter" /&gt; </code></pre> <p>3) The actual IValueConverter derived class is defined here:</p> <pre><code>[ValueConversion(typeof(PlanarMember), typeof(Geometry))] class PlanarMemberConverter : IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (targetType != typeof(Geometry)) return null; var planarMember = value as PlanarMember; var collection = new PathFigureCollection(planarMember.Openings.Count() + 1) { new PathFigure( planarMember.Boundary.Vertices.First().AsPoint(), ToSegments(planarMember.Boundary.Vertices), true){IsFilled = true} }; foreach (var opening in planarMember.Openings) { collection.Add(new PathFigure( opening.Vertices.First().AsPoint(), ToSegments(opening.Vertices), true) { IsFilled = true }); } return new PathGeometry(collection) {FillRule = FillRule.EvenOdd}; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } #endregion public IEnumerable&lt;PathSegment&gt; ToSegments(IEnumerable&lt;Point&gt; points) { return from point in points select (PathSegment)new LineSegment(point.AsPoint(), true); } } </code></pre>
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    1. POHow can I draw a WPF polygon with openings?
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