c# - Binding error when binding CollectionViewSource to custom ItemsSource -

i have written control having issues binding collectionviewsource itemssource property. if bind observablecollection itemssource property works expected. collectionviewsource bound following binding error in output.

error: converter failed convert value of type 'windows.ui.xaml.data.icollectionview' type 'ibindableiterable'; bindingexpression: path='jobview.view' dataitem='app.viewmodel.mainviewmodel'; target element myspecialcontrol.myspecialcontrol' (name='null'); target property 'itemssource' (type 'ibindableiterable').

public sealed class myspecialcontrol: control {     public ienumerable itemssource     {         { return (ienumerable)getvalue(itemssourceproperty); }         set { setvalue(itemssourceproperty, value); }     }       public static readonly dependencyproperty itemssourceproperty =         dependencyproperty.register("itemssource", typeof(ienumerable), typeof(myspecialcontrol), new propertymetadata((ienumerable)null, onitemsourcepropertychanged));      private static void onitemsourcepropertychanged(dependencyobject d, dependencypropertychangedeventargs e)     {         ((myspecialcontrol)sender).onitemsourcepropertychanged((ienumerable)  eventagrs.oldvalue, (ienumerable)eventagrs.newvalue);     }       private void onitemsourcepropertychanged(ienumerable oldvalue, ienumerable newvalue)     {         inotifycollectionchanged oldcollectionchanged = oldvalue inotifycollectionchanged;         if (oldcollectionchanged != null)             oldcollectionchanged.collectionchanged -= itemsource_collectionchanged;          inotifycollectionchanged newcollectionchanged = newvalue inotifycollectionchanged;         if (newcollectionchanged != null)             newcollectionchanged.collectionchanged += itemsource_collectionchanged;     }      private void itemsource_collectionchanged(object sender, notifycollectionchangedeventargs e)     {       ...     } } 

in xaml have bound collectionviewsource.view

any ideas how change itemssource accept observablecollection collectionviewsource.view ?

thanks