public string GetFileName(string fullname)
{
  for(int i = fullname.Length - 1; i >= 0; i--)
  {
    if(fullname == '\\')
    {
      return(fullname.Substring(i + 1));
    }
  }
  return(fullname);
}
 
public string GetFolderName(string fullname)
{
  for(int i = fullname.Length - 1; i >= 0; i--)
  {
    if(fullname == '\\')
    {
      return(fullname.Substring(0, i));
    }
  }
  return(fullname);
}