My webpage is an Entity Framework object. They are associated with WPF TreeView. I want to order all the web pages shown in TreeView in the Sort property.

the code

Edmx

The Subordinates property returns a collection of zero or more web pages.

Xaml

<TreeView Name="TreeViewWebpages">
    <TreeView.Resources>
        <HierarchicalDataTemplate DataType="{x:Type local:Webpage}"
                                  ItemsSource="{Binding Subordinates}">
            <TextBlock Text="{Binding Path=Title}" />
        </HierarchicalDataTemplate>
    </TreeView.Resources>
</TreeView>

WITH#

TreeViewWebpages.ItemsSource = from Webpage root in db.Webpages.Include("Subordinates")
                               where root.Dominant == null
                               select root;

Result

TreeView has disordered web pages.

Problem

How to change this to arrange all the web pages displayed in the TreeView in the Sort property?

Update

This ValueConverter works (thanks @KP Adrian and @IVerzin). Is there a better way?

Xaml

ItemsSource="{Binding Path=Subordinates, Converter={local:SortConverter}}"

WITH#

[ValueConversion(typeof(EntityCollection<Webpage>), typeof(EntityCollection<Webpage>))]
public class SortConverter : MarkupExtension, IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return ((EntityCollection<Webpage>)value).OrderBy(o => o.Sort);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return null;
    }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        return this;
    }
}