WPF Media.Source Uri Sorunu

 private void listbox2_Drop(object sender, DragEventArgs e)
        {

            try
            {
                string[] a = (string[])(e.Data.GetData(DataFormats.FileDrop, false));

                foreach (var names in a)
                {
                    FileInfo fileInfo = new FileInfo(names);
                    if (fileInfo.Extension == ".MP3" ||
                        fileInfo.Extension == ".mp3")
                    {
                  
                     
                        listbox2.Items.Add( fileInfo.Name);
           
                    }

                }
            }

            catch (Exception)
            {

            }
       }



        private void listbox2_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {

            object listboxİtems = listbox2.SelectedItem;
            if (listboxİtems != null)
            {
               // Hata veren satır.
                media2.Source = new Uri(listboxİtems.ToString());
                media2.Play();
            
            }
        
        }

listbox2.Items.Add( fileInfo.Name);

listbox2.Items.Add(fileInfo);

media2.Source = new Uri(listboxİtems.FullName);

media2.Source = new Uri(listbox2.SelectedItem.ToString());
media2.Play();