void MainFormDragDrop(object sender, System.Windows.Forms.DragEventArgs e)
		{
			  string[] files = (string[])e.Data.GetData(System.Windows.Forms.DataFormats.FileDrop);

  foreach(string file in files)
{ string ext = System.IO.Path.GetExtension(file);
  string jar = ".jar";
  string jad = ".jad";  
  string directoryName = System.IO.Path.GetDirectoryName(file);
  string finalr = directoryName + @"\_jar";
  string finald = directoryName + @"\_jad";
if (ext == jar)
        {
		  System.IO.File.Move(file,finalr);
        }
  	else if (ext == jad)
        {
		  System.IO.File.Move(file,finald);
        }
        else 
{
System.Windows.Forms.MessageBox.Show("You need to drag a .jar or .jad file.");
}