using System;
using System.IO;
using System.Windows.Forms;

public static class ClipboardFusionHelper
{
    public static string ProcessText(string text)
    {
        StringReader sr = new StringReader(text);
      bool notAllValuesAreNumeric = false;
      double summedValues = 0.0;
      string lineStringVal;
      lineStringVal= sr.ReadLine();
      while (lineStringVal != null)
      {
          double val;
          if (Double.TryParse(lineStringVal, out val))
             summedValues += val;
            else
                notAllValuesAreNumeric = true;
            
            lineStringVal = sr.ReadLine();
        }

        string message = "Sum: " + summedValues.ToString();
        if (notAllValuesAreNumeric)
          message += "\n!!!NOTE: Not All Values were numeric.!!!";

      MessageBox.Show(message, "Sum of All Lines", MessageBoxButtons.OK, MessageBoxIcon.Information);
        return summedValues.ToString();
    }
}