title: wpf toolkit line chart without points and with different line colors
body: <p>I have some chart and I want to add dynamicly LineSeries without DataPoints, just lines with some custom colors. The only way I found to hide data points is:</p>
  
  <pre><code>Style style = new Style(typeof(LineDataPoint));
  style.Setters.Add(new Setter(LineDataPoint.TemplateProperty, null));
  
  var series = new LineSeries()
  {
        Title = name,
        DependentValuePath = "Y",
        IndependentValuePath = "X",
        ItemsSource = new ObservableCollection&lt;FloatingPoint&gt;(),
        DataPointStyle = style,
  
          };
  </code></pre>
  
  <p>Unfortunately when I do this all lines become yellow and I can't change their colors.
  I tried to do this:</p>
  
  <pre><code>Style style = new Style(typeof(LineDataPoint));
          style.Setters.Add(new Setter(LineDataPoint.TemplateProperty, null));
  
          SolidColorBrush brush = new SolidColorBrush(Colors.Red);
  
          var series = new LineSeries()
          {
              Title = name,
              DependentValuePath = "Y",
              IndependentValuePath = "X",
              ItemsSource = new ObservableCollection&lt;FloatingPoint&gt;(),
              DataPointStyle = style,
              Background = brush,
  
          };
  </code></pre>
  
  <p>But it doesn't help - I can't change line color... Even if I write </p>
  
  <pre><code>series.Background = brush;
  </code></pre>