C#

using (System.IO.FileStream FileStream = System.IO.File.Create(FileName))
using (System.IO.Stream Stream = Application.GetResourceStream(new Uri(AbsolutePath, UriKind.Absolute)).Stream)
{
    Stream.Seek(0, System.IO.SeekOrigin.Begin);
    Stream.CopyTo(FileStream);
}

using (System.IO.FileStream FileStream = System.IO.File.OpenRead(Path))
{
    NewDictionary = (ResourceDictionary)System.Windows.Markup.XamlReader.Load(FileStream);
}

private void liw_Source_ItemDrag(object sender, ItemDragEventArgs e)
{
    string s = e.Item.ToString();
    DoDragDrop(s, DragDropEffects.Copy | DragDropEffects.Move);
}

private void liw_Target_DragEnter(object sender, DragEventArgs e)
{

if (e.Data.GetDataPresent(DataFormats.Text))
    e.Effect = DragDropEffects.Copy;
else
    e.Effect = DragDropEffects.None;
}

private void liw_Target_DragDrop(object sender, DragEventArgs e)
{
    string typestring = "Type";
string s = e.Data.GetData(typestring.GetType()).ToString();
string orig_string = s;
s = s.Substring(s.IndexOf(":") + 1).Trim();
s = s.Substring(1, s.Length - 2);

this.liw_Target.Items.Add(s);

IEnumerator enumerator = liw_Source.Items.GetEnumerator();
int whichIdx = -1;
int idx = 0;
while (enumerator.MoveNext()) {
    string s2 = enumerator.Current.ToString();
    if (s2.Equals(orig_string)) {
        whichIdx = idx;
        break;
    }
    idx++;
}
this.liw_Source.Items.RemoveAt(whichIdx);

}