Dostęp do błędów C#

 
foreach (string linia in tekst)
                {


                    if (linia.StartsWith("\"FS\""))//czy linijka to FS?
                    {
                        licznik = 0;
                        slowo = linia.Split(new string[] { ",", ",\"", "[", "\r\n" }, StringSplitOptions.None).ToArray();
                        #region FS
                        string kij = (
                slowo[21].Substring(0, 8) + " "                                                      //1
                + slowo[6].Trim(new char[] { '\"' }).PadRight(16).Substring(0, 16) + " "              //2
                + slowo[13].Trim(new char[] { '\"' }).PadRight(40).Substring(0, 40) + " "             //3
                + slowo[15].Trim(new char[] { '\"' }).PadRight(6).Substring(0, 6) + " "              //4a
                + slowo[14].Trim(new char[] { '\"' }).PadRight(12).Substring(0, 12) + " "            //4b
                + slowo[16].Trim(new char[] { '\"' }).PadRight(20).Substring(0, 20) + " "            //4c
                + slowo[17].Trim(new char[] { '\"' }).PadRight(15).Substring(0, 15) + " "               //5
                + slowo[19].Trim(new char[] { '\"' }).PadRight(38).Substring(0, 38) + " "               //6
                + Convert.ToString(index).PadLeft(3).Substring(0, 3) + " "                             //7
                + "NFN"                                                                               //8
                );
                        #endregion
                        listBox1.Items.Add(kij);
                        //licznik = 0;
                        index++;

                    }
                    else
                    {
                        licznik++;
                        if (licznik == 3)
                        {
                            zawartosc = linia.Split(new string[] { ",", ",\"", "[", "\r\n" }, StringSplitOptions.None).ToArray();
                            ;
                            string kij = (
                                 slowo[22].PadRight(8).Substring(0, 8) + " "
                                 + slowo[25].PadLeft(3).Substring(0, 3) + " "
                                 + "N" + " " + " "
                                 + zawartosc[1].PadRight(5).Substring(0, 4).Replace('.', ',') + " "
                                 + slowo[27].PadRight(14).Substring(0, 12).Replace('.', ',') + " "
                                 + "V" + " " + " "
                                 + zawartosc[1].PadRight(5).Substring(0, 4).Replace('.', ',') + " "
                                 + slowo[28].PadLeft(14).Substring(0, 12).Replace('.', ',') + " "
                                 + "Z"
                                 );
                            listBox1.Items.Add(kij);
                            listBox1.Items.Add("\n");
                        }
                    }
                }
                #endregion