private void PDBManagerForm_DragDrop(object sender, DragEventArgs e)
        {
            if (!e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                return;
            }

            string[] pdbs    = (string[])e.Data.GetData(DataFormats.FileDrop);
            bool     havePdb = false;

            foreach (string pdb in pdbs)
            {
                if (string.Compare(Path.GetExtension(pdb), ".pdb", StringComparison.OrdinalIgnoreCase) == 0 && File.Exists(pdb))
                {
                    if (mainForm.AttachPDB(pdb, this))
                    {
                        Configs.Instance.AddRecentPdb(mainForm.Mapping.Filename, pdb);
                        havePdb = true;
                    }
                }
            }

            if (havePdb)
            {
                LoadList();
            }
        }