Wpf combobox does'nt show any item

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WPF

combobox

Binding

hi all.
i have a usercontrol in a wpf priject and used a combobox but the combobox doesn;t show any item.please help me.thanks in advace
this is my xaml code

<combobox grid.column="1" grid.row="1" name="ComboBox_Owner" flowdirection="LeftToRight">
ItemsSource="{Binding Source={StaticResource PersonResource}}" SelectedValue="{Binding Path=Person_ID}"DisplayMemberPath="Family" SelectedValuePath="Person_ID"
Margin="5,4,6,9" Foreground="#FF000086" />
/////////////////////////////////////////////////////////////////////////////////
this is my code behind:


ObservableCollection<personnel> _Person = new ObservableCollection<personnel>();

CollectionViewSource PersonCollection = new CollectionViewSource();

PersonCollection = (CollectionViewSource)this.Resources["PersonResource"];

this._Person = new ObservableCollection<personnel>(from p in this.context.Personnels orderby p.Person_ID select p);

PersonCollection.Source = _Person;

What I have tried:

i have set combobox itemsource to a list a query and.. but it did'nt work