How to get exception ocurred exact line number in try catch

try

{

      countAdd1 = 1 / countAdd1;

}

catch (Exception ex)

{

      StackTrace st = new StackTrace(ex, true);

      StackFrame[] frames = st.GetFrames();

      // Iterate over the frames extracting the information you need

      foreach (StackFrame frame in frames)

      {

            Console.WriteLine("{0}:{1}({2},{3})", frame.GetFileName(),                frame.GetMethod().Name, frame.GetFileLineNumber(),                frame.GetFileColumnNumber());

      }