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Using the example from the documentation, the ListBox displays properly and the drag and drop work fine. However, if I decorate the properties with the JsonPropertyAttribute, 
the ListBox still displays fine, but the drag and drop causes errors in the console.

    public class CountryCode
        public string Name { get; set; }
        public string Code { get; set; }

results in:


There may be no obvious reason to do this in a simple app, but if the model is coming from an external source (and the user is unaware of those properties), this can be very confusing. Especially since we've already specified the correct name

    <ListBoxFieldSettings Text="Name" Value="Code" />

Attached sample project.