try catch continue execution

To add try/catch blocks around your if statements and ensure the code continues execution even if an error occurs, you can nest the try/catch blocks appropriately. Here is the modified code:

using System;
using System.IO;
using System.Linq;

namespace FCCCU318SymitarPreprocessor
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length > 0)
            {
                string inputFilePath;
                string outputFilePath;

                string inputFilePathOnly;
                string fileToImport;

                string strNewLine;

                string reportID;
                string reportName;
                string reportDate;
                string reportTime;
                string FileName;
                string FileTypeNum;

                inputFilePath = args[0].ToString();
                outputFilePath = args[1].ToString();

                inputFilePathOnly = Path.GetDirectoryName(inputFilePath);

                string inputFile = inputFilePath;

                // Read Index.txt file
                using (StreamReader sr = new StreamReader(inputFile))
                {
                    string lineData;
                    lineData = sr.ReadLine();

                    while (!sr.EndOfStream)
                    {
                        lineData = sr.ReadLine();

                        if (lineData.Length > 6)
                        {
                            bool isError = false;
                            try
                            {
                                reportID = lineData.Substring(0, 6);

                                var isNumeric = reportID.All(c => "0123456789".Contains(c));

                                // if the reportId is numeric process the line
                                if (isNumeric)
                                {
                                    // reportName is the OnBase DocType
                                    reportName = lineData.Substring(7, 41).Trim();
                                    if (reportName.Length > 1)
                                    {
                                        if (reportName.Length > 18)
                                        {
                                            if (reportName.Substring(0, 17).ToUpper() == "BATCH OUTPUT FOR ")
                                            {
                                                reportName = reportName.Substring(17);
                                            }
                                        }

                                        reportDate = lineData.Substring(49, 8).Trim();
                                        reportTime = lineData.Substring(61, 5).Trim();

                                        FileTypeNum = "1"; // Assumption is that all the Symitar Reports are text
                                        FileName = reportID;  // Assumption is that the reportID will always be the file name without an extension

                                        fileToImport = inputFilePathOnly + @"\" + FileName;
                                        try
                                        {
                                            if (new FileInfo(fileToImport).Length > 0)
                                            {
                                                // reportName used for DocType and for the Report Name Keyword Type
                                                // DocType hard coded to Symitar Reports Temp as DocType is assigned form the Report Name in the DocType Assignment Workflow
                                                strNewLine = reportID + "|" + "FCCCUReports" + "|" + reportName + "|" + reportDate + "|" + reportDate + " " + reportTime + "|" + FileTypeNum + "|" + FileName;

                                                using (StreamWriter sw = new StreamWriter(outputFilePath, true))
                                                {
                                                    sw.WriteLine(strNewLine);
                                                }
                                            }
                                        }
                                        catch
                                        {
                                            isError = true;
                                        }
                                    }
                                }
                            }
                            catch
                            {
                                isError = true;
                            }
                            if (isError) continue;
                        }
                    }
                    Environment.ExitCode = 0;
                }
            }
        }
    }
}

I added a bool isError flag to indicate whether an error has occurred within the try block. If an error is caught, the isError flag is set to true, and the continue statement is used to skip to the next iteration of the while loop. This ensures that the program continues execution even if an error occurs.