title: show legend for oxyplot pie chart
body: <p>I want to have a beautiful legend. I read the documentation, but could not find this case.</p>
  
  <p>I have <code>PlotView</code> in xaml</p>
  
  <pre><code>&lt;oxy:PlotView  Model="{Binding ResidentsPhotoChartViewModel.ChartModel}" Style="{StaticResource PlotViewStyle}" /&gt;
  </code></pre>
  
  <p><code>PlotView</code> Style</p>
  
  <pre><code>&lt;Style x:Key="PlotViewStyle" TargetType="{x:Type oxy:PlotView}"&gt;
      &lt;Setter Property="IsLegendVisible" Value="True" /&gt;
      &lt;Setter Property="LegendOrientation" Value="Horizontal" /&gt;
      &lt;Setter Property="LegendPosition" Value="BottomCenter" /&gt;
      &lt;Setter Property="LegendTextColor" Value="White" /&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p><code>PlotModel</code> in code </p>
  
  <pre><code>public PlotModel ChartModel
  {
      get
      {
          return CreateModel(CreatePieSeries(_chartPieSlicesList));
      }
  }
  
  
  public ResidentsPhotoChartViewModel()
  {
      _residentsWithPhotoSlice = CreatePieSlice(CLResources.DontHavePhoto, 0, OxyColors.LimeGreen);
      _residentsWithoutPhotoSlice = CreatePieSlice(CLResources.HavePhoto, 0, OxyColors.Red);
  
      _chartPieSlicesList = new List&lt;PieSlice&gt; { _residentsWithPhotoSlice, _residentsWithoutPhotoSlice };
  }
  
  private static PlotModel CreateModel(Series series)
  {
      return new PlotModel
      {
          Series = {series},
          IsLegendVisible = true,
          LegendTitle = "LegendTitleFromModel",
      };
  }
  
  private static PieSeries CreatePieSeries(List&lt;PieSlice&gt; slices)
  {
      return new PieSeries
      {
          Title = "SeriesTitle",
          StrokeThickness = StrokeThickness,
          InnerDiameter = InnerDiameter,
          Slices = slices
      };
  }
  </code></pre>
  
  <p>I want to have something like <a href="http://screencast.com/t/0oMOXKD4x" rel="nofollow">this</a>, but it <a href="http://screencast.com/t/PAnkSLM5xf" rel="nofollow">doesn't look</a> like it should. </p>