convert from object to ObservableCollection

Question

Hi,

     Could anyone help me to convert from object to  ObservableCollection, sample code below

 

func1()

{

 

lvItems.ItemsSource = portNameLists;  //portNameLists is of type ObservableCollection getting assigned to listview object

CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(lvItems.ItemsSource);

view.Filter = func2;

} 

 

 func2(object item)

{

   // here i need to convert item which is of type object to ObservableCollection

so that i can perform like 

item.Where(X => X.address == addr.Text) 

 

}