var count = 100;
double PIES = Math.PI / count;
Point center = new Point(CanvasPanel.ActualWidth / 2, CanvasPanel.ActualHeight / 2);
double radius = 500;//0.1333 * Math.Min(CanvasPanel.ActualWidth, CanvasPanel.ActualHeight);
for (int i = 0; i <= count; i++)
{
    Path path1 = new Path();
    PathGeometry pathGeo = new PathGeometry();
    PathFigure PathFig = new PathFigure();

    double radians = 2 * Math.PI * i / count;

    PathFig.StartPoint = center;
    PathFig.Segments.Add(new LineSegment(new Point(center.X + radius * Math.Cos(radians + PIES), center.Y - radius * Math.Sin(radians + PIES)), true));
    PathFig.Segments.Add(new ArcSegment(new Point(center.X + radius * Math.Cos(radians + 3 * PIES), center.Y - radius * Math.Sin(radians + 3 * PIES)), new Size(500, 500), 1, false, SweepDirection.Counterclockwise, true));
    PathFig.Segments.Add(new LineSegment(center, true));
    PathFig.IsClosed = true;
    PathFig.IsFilled = true;
    pathGeo.Figures.Add(PathFig);
    pathGeo.FillRule = FillRule.Nonzero;
    path1.Data = pathGeo;
    path1.Stroke = Brushes.Black;
    path1.Fill = Brushes.White;

    path1.StrokeThickness = 0.25;

    CanvasPanel.Children.Add(path1);
}
for (int i = count; i >= 0; i--)
{
    double radians = 2 * Math.PI * i / count;

    var text = new TextBlock()
    {
        Height = 30,
        Background = Brushes.Transparent,
        Text = "Lorem",
        FontFamily = new FontFamily("Verdana"),
        FontSize = 15,
        RenderTransform = new TranslateTransform
        {
            X = center.X + 400 * Math.Cos(radians + PIES) - 50,
            Y = center.Y - 400 * Math.Sin(radians + PIES) - 50
        },
        LayoutTransform = i < count / 2 ? new RotateTransform(radians/ (Math.PI / 180)) : new RotateTransform(-1 * radians/ (Math.PI / 180))
    };

    CanvasPanel.Children.Add(text);
}