I tried replacing in the ChartControl.xaml
<SolidColorBrush x:Key="ChartControl.ChartBackground" Color="#1e1e1e" po:Freeze="true" />
<ImageBrush ImageSource="image1.jpg" x:Key="ChartControl.ChartBackground" po:Freeze="true" />
The calling thread cannot access this object because a different thread owns it.
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