Thanks for the reply, i have a problem, i get this error
Error Ambiguous type reference. A type named 'SortDirectionToVisibilityConverter' occurs in at least two namespaces, 'Syncfusion.UI.Xaml.Grid' and 'Syncfusion.Windows.Tools.Controls'. Consider adjusting the assembly XmlnsDefinition attributes.
These are the origal file namespaces, none worked
xmlns:local="clr-namespace:Syncfusion.UI.Xaml.Grid"
xmlns:filterrow="clr-namespace:Syncfusion.UI.Xaml.Grid.RowFilter">
I change with this namespace and worked, but I got the error mentioned
xmlns:local="http://schemas.syncfusion.com/wpf"