.NET 4.0 regression, LegendModifier causes exception to be thrown as of version 4.2.1.9358

Visual Studio 2015

This isn’t a critical issue since it is handled but since it didn’t do this for the old version I thought I’d bring it to your attention. Awesome product BTW.

I just upgraded my .NET 4.0 SciChart 2D application from SciChart version 4.1.1.8645 to 4.2.1.9358.
Now I get the following (handled) exception message in the output window if I use a legend with my chart:

Exception:
System.Windows.Data Warning: 40 : BindingExpression path error: ‘ScrollViewer’ property not found on ‘object’ ”LegendPlaceholder’ (Name=”)’. BindingExpression:Path=ScrollViewer.HorizontalScrollBarVisibility; DataItem=’LegendPlaceholder’ (Name=”); target element is ‘SciChartLegend’ (Name=”); target property is ‘HorizontalScrollBarVisibility’ (type ‘ScrollBarVisibility’)

This XAML the triggers the exception (comment it out and exception goes away):

                        <s:SciChartSurface.ChartModifier>
                            <s:ModifierGroup>
                                <s:LegendModifier ShowLegend="True" />
                            </s:ModifierGroup>
                        </s:SciChartSurface.ChartModifier>

How to reproduce:
– Take the EEG sample with the latest SciChart version (4.2.1.9358)
– Change the target framework to .NET 4.0
– Change the SciChart references to use the SciChart 4.2, net40 DLLs.

I made a test solution for the following combinations:
.NET 4.5 with SciChart 4.2 works
.NET 4.0 with SciChart 4.2 throws exception
.NET 4.0 with SciChart 4.1 works