private void listview_ItemDrag(object sender, ItemDragEventArgs e){
  DataObject object = new DataObject()
  string f = listview.SelectedItems[0].Text;
  object.SetData(DataFormats.FileDrop, f);
  DoDragDrop(object, DragDropEffects.All);
}

        private void lsvFiles_ItemDrag(object sender, ItemDragEventArgs e)
        {
            // Proceed with the drag-and-drop, passing the selected items for 
            string[] filepaths = new string[listview.SelectedItems.Count];
            int i = 0;
            foreach (ListViewItem item in listview.SelectedItems)
                filepaths[i++] = ((FileInfo)item.Tag).FullName;
            DataObject data = new DataObject(DataFormats.FileDrop, filepaths);
            data.SetData(DataFormats.StringFormat, filepaths);
            DoDragDrop(data, DragDropEffects.Copy);
        }