private static object ValueCoerceCallback(DependencyObject d, object baseValue)
{
var dp = d as RangePanel;
Scope bv = baseValue as Scope;
if (bv == null)
{
var s = new Scope();
dp.Value = s;
return s;
}
return baseValue;
}
public FilterNode()
{
Children = new ObservableCollection<IFilterNode>();
Scope = new Scope();
}