title: Showing tooltip on kendo chart
body: <p>I am using Telerik UI for ASP.NET Core  </p>
  
  <p>I have a kendo chart that shows <code>date vs int</code> graph. The model has 2 properties <code>CreatedDateTime(datetime)</code> and <code>Count(int)</code>.  The chart do the sum of count by month.
  Below is the model and chart</p>
  
  <pre><code>public class Document
  {
      public DateTime CreatedDateTime { get; set; }
  
      public int Count { get; set; }
  }
  
  
  
  @model IEnumerable&lt;Document&gt;
  
  @(Html.Kendo().Chart(Model)
                  .Name("chart")
                  .Title("Dashboard Metrics")
                  .Legend(legend =&gt; legend
                  .Position(ChartLegendPosition.Bottom)
              )
              .Series(series =&gt;
              {
                  series
                  .Area(model =&gt; model.Count, model =&gt; model.CreatedDateTime)
                  .Aggregate(ChartSeriesAggregate.Sum)
                  .Name("Document Count").Color("#BA2727").Opacity(.7);
              })
              .CategoryAxis(axis =&gt; axis
                  .Date()
                  .BaseUnit(ChartAxisBaseUnit.Months)
                  .Labels(labels =&gt; labels.DateFormats(formats =&gt; formats.Months("MMM")))
              )
              .Tooltip(tooltip =&gt; tooltip
                  .Visible(true)               
                  .Format("{0:N0}"))
          )
  </code></pre>
  
  <p>Currently chart shows only 'Count` as tooltip, in addition i also want to show month in the tooltip.</p>
  
  <p>I would like to know what would be the syntax for tooltip to show month as well? There is tooltip.template() method but im not able to figure the syntax to show both count and month.</p>