title: wpf toolkit scatter chart
body: <p>I have never been so annoyed with this wpf toolkit.  The documentation is just not there! argh.</p>
  
  <p>How on earth can you connect the lines in a scatter chart?</p>
  
  <p>I need to produce a graph that is linear across multiple series.  I prototyped what I need to do using Excels scatter chart just fine, but for the life of me I cannot figure out how to connect the dots in the tool kit.</p>
  
  <p>Here is the code, am I missing an option?</p>
  
  <pre><code>&lt;my:Chart Name="myChart" Margin="5,5,5,5" Opacity="1" Width="525"&gt;
  &lt;/my:Chart&gt;
  
  ScatterSeries a = new ScatterSeries();
  a.Title = "a";
  
  a.IndependentValuePath = "Key";
  a.DependentValuePath = "Value";
  myChart.Series.Add(a);
  
  a = new ScatterSeries();
  a.Title = "b";
  a.IndependentValuePath = "Key";
  a.DependentValuePath = "Value";
  myChart.Series.Add(a);
  
  ((ScatterSeries)myChart.Series[0]).ItemsSource = new KeyValuePair&lt;DateTime, int&gt;[]
   {
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(1), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(2), 150),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(3), 150),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(4), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(5), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(8), 130),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(9), 130),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(10), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(11), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(15), 225),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(16), 225),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(17), 0)
   };
  
  
  ((ScatterSeries)myChart.Series[1]).ItemsSource = new KeyValuePair&lt;DateTime, int&gt;[]
  {
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(-21), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(-5), 750),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(3), 750),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(7), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(9), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(10), 330),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(19), 330),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(20), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(21), 0),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(25), 525),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(26), 525),
     new KeyValuePair&lt;DateTime, int&gt;(DateTime.Now.AddMonths(27), 0)
  };
  </code></pre>