Drag and drop dynamic objects in ListView WPF C#

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C#

Windows

I am using the following code to drop the dynamic ellipse in listview... the event mousMove is working but the object not appearing in the dropped position, still there in old position.. I am looking to drag and drop in the same listview. tlist is the observableCollection

private void listview_Drop(object sender, DragEventArgs e) {

Ellipse droppedData = e.Data.GetData(typeof(Ellipse)) as Ellipse;
Ellipse target = ((ListViewItem)(sender)).DataContext as Ellipse;

int removedIdx = listview.Items.IndexOf(droppedData);
int targetIdx = listview.Items.IndexOf(target);

if (removedIdx < targetIdx)
{
tlist.Insert(targetIdx + 1, droppedData);
tlist.RemoveAt(removedIdx);
}
else
{
int remIdx = removedIdx + 1;
if (tlist.Count + 1 > remIdx)
{
tlist.Insert(targetIdx, droppedData);
tlist.RemoveAt(remIdx);
}
}