Why does binding to a set of Winforms cascading combo boxes cause the root combo box to not set its value properly?

DataBinding can be difficult to debug when it misbehaves. There are two things going wrong here, enough to make it hard to diagnose. The first thing you didn't count on is that the SelectedValueChanged event fires before the currency manager updates the bound object.

That normally isn't a problem but your event handler has a side-effect. The next thing you didn't count on is that changing one property of the bound object causes the binding of all other properties to be updated as well.

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