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copied!<p>In your example you have a number of <code>LineGeometry</code> instances inside a <code>GeometryGroup</code> inside a <code>GeometryDrawing</code>.</p> <p>First, I'd link to bring to your attention that you're not actually using the <code>GeometryDrawing</code>. In your example you've used it solely as a place holder for your <code>GemetryGroup</code>.</p> <p>Ignoring this the problem is that <code>LineGeometry</code> instances were not intended to draw shapes and <code>GeometryGroup</code> is not able to realize that your 6 <code>LineSegments</code> together form a closed shape.</p> <p>Despair not however as there is a way to accomplish what you want: <code>PathGeometry</code>. This geometry essentially defines the contour of a region that may be filled! This contour may is defined by a starting point and a series of <code>PathSegment</code>s.</p> <pre><code>private Point GetExtremity(Point center, double radius, double orientation) { return new Point( center.X + Math.Cos(orientation) * radius, center.Y + Math.Sin(orientation) * radius ); } public void DrawUniformShape(DrawingContext context, Brush brush, Pen pen, Point center, double radius, int sides, double orientationRadians) { context.DrawGeometry( brush, pen, new PathGeometry( Enumerable.Repeat( new PathFigure( GetExtremity(center, radius, orientationRadians), from vertex in Enumerable.Range(1, sides - 1) let angle = orientationRadians + vertex * 2 * Math.PI / sides select new LineSegment(GetExtremity(center, radius, angle), true), true ), 1 ) ) ); } public void DrawBarnColouredHexagon(DrawingContext context, Point center, double radius, double orientation) { DrawUniformShape( context, Brushes.Red, new Pen(Brushes.White, 2), center, radius, 6, 0 ); } </code></pre>

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