Using AddRange to add new DataPoints results in incorrect positioning for the new items. They appear as if XValue = 0, although they have valid XValues. The problem appears when adding DataPoints with Suspend/ResumeNotifications too.

Chart: Exceptions thrown in chart with annotations and all-zero values. See ticket #440209 for an example.

Applying theme to RadChart does not work for Line / Area series definition: 

Category: ParserError      
Message: System.Windows.Markup.XamlParseException:  [Line: 0 Position: 0] ---> System.Windows.Markup.XamlParseException: Failed to assign to property 

Add the ability to select multiple series items through UI drag selection.

The Chart overrides the Colors from the ApplicationTheme no matter of the Theme set through SetTheme method. Ticket ID: 431553.

Area fill is not set correctly when IsZeroBased is false. This is visible when LinearGradientBrush is used.

DateTime-specific group descriptors (ChartMonthGroupDescriptor, ChartYearGroupDescriptor, etc.) not working with nullable DateTime field type.

You can work around this issue by using plain ChartGroupDescriptors instead. For example if you wanted to use ChartMonthGroupDescriptor, you can achieve the same effect by exposing the Month field of the DateTime> as a int? read-only property on your business object, and then you will be able to properly group by the newly created integer field.

Having SeriesItemLabel custom style (style2) based on another style (style1), style1 is ignored.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (use the LabelDefinitions property of the series).

Provide access to RadChart in ItemTooltipOpening/Closing event.

Dynamically adding additional YAxis has problems depending on the way it is added:
At runtime on button click:
* The additional axis is not added (not visible in the plot area).
* If AdditionalYAxis are data bound and a series refferences a dynamically add

Caused by setting cursor in the drag and zoom layer.

Two DataSeries with one DataPoint each where the YValue is 0. The Label for the first one is set to custom string and the Label for the second one as white space string " ". As a result both labels do not appear.

Cannot change the ChartLegendItem style run time through the LegendStyle property of RadChart and the LegendItemStyle property of ChartLegend.

When you have 0 data points there is a visual glitch in all themes with stroke around the slices.

A horizontal line from the last data point to the end need to be added.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

Case: Live data scenario in which data comes from the left with step 0.2. The labels should be with step 10 and show only integer labels like this: 0, 10, 20, 30, 40, etc. If the min data at the beginning of the chartarea is 0.6 for example the first label

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (use the TickOrigin property of the axis).

When KeepExtremes sampling function is used, EmptyPointBehavior.Gap and EmptyPointBehavior.Drop settings are ignored and points appear as if EmptyPointBehavior.Zero is used.

When updating the ItemSource, the labels are formatted before the update of all items is completed.

The options how RadChart draws the pie/doughnut slices need to be extended - there should be a clockwise and anticlockwise direction.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

enable localization for human readable formats