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Data Binding throws exception when Data Context is cleared


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Hi, I have a Chart which is bound to List of lists of points (lines of points basically) and it uses List transform to bind property "X" to X axis etc. Now, when I call a method which basically clears this List of Lists (removes all series) I get exception from some data binding function, which is unhappy about not having anything on the chart. Similarly, it breaks when I use List.removeAt() for all objects. Any solution? I am happy with removing the Chart (deleting object) when this is invoked, but then I have to set everything (all my xaml properties etc.) again when I add new series and generate new chart right?

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