convert csv to xlsx using ClosedXML for attendance book

csv2xlsx.cs

using System; // using visual studio 2019
using System.IO; //for StreamReader
using System.Text;// for encoding
using ClosedXML.Excel; //for xlsx , install from nuget, v0.95.2

//convert csv to xlsx using ClosedXML for attendance book
namespace csv2xlsx
{
    class Program
    {
        static void Main(string[] args)
        {
            const int MAX_NUM_ROW = 33; // num of days in month + id + label =33
            const int MAX_NUM_COLUMN = 16;// num of labels =16
            try
            {
                if (args.Length < 1) throw new ArgumentException();
                string myFnameCsv = args[0];
                string myFnameXlsx = myFnameCsv.Replace(".csv", ".xlsx");
                //string mySheetName = myFnameCsv.Replace(".csv", "");
                string mySheetName = Path.GetFileName(myFnameCsv).Replace(".csv", "");

                Encoding myEncSjis = Encoding.GetEncoding("Shift_JIS");

                string[,] myAryStr = new string[MAX_NUM_ROW, MAX_NUM_COLUMN];
                UInt32 uiMaxRow = 0;
                UInt32 uiMaxColumn = 0;

                // read csv file
                using (StreamReader myrd = new StreamReader(myFnameCsv,myEncSjis))
                {
                    UInt32 uiR = 0;
                    while (!myrd.EndOfStream)
                    {
                        string[] tmpStAry = myrd.ReadLine().Split(',');
                        UInt32 uiC = 0;
                        foreach (string tmpstr in tmpStAry)
                        {
                            string tmpstr2 = tmpstr.Replace("\"", "");
                            myAryStr[uiR, uiC] = tmpstr2;
                            //Console.Write(tmpstr2 + "\t");
                            uiC += 1;
                        }//end of foreach
                        uiMaxColumn = uiMaxColumn < uiC ? uiC : uiMaxColumn;
                        uiR += 1;
                        //Console.WriteLine("");
                    }// end while
                    uiMaxRow = uiR;
                }//end using csv file

                // write xlsx file
                using (var myBook = new XLWorkbook(XLEventTracking.Disabled))
                {
                    var mySheet1 = myBook.AddWorksheet(mySheetName);
                    for (int uiR = 0; uiR < uiMaxRow; uiR++)
                    {
                        for (int uiC = 0; uiC < uiMaxColumn; uiC++)
                        {
                            mySheet1.Cell(uiR + 1, uiC + 1).Value = myAryStr[uiR, uiC];
                            //Console.Write(myAryStr[uiR, uiC] + "\t");
                        }//end for uiC
                        //Console.WriteLine("");
                    }//end for uiR
                    myBook.SaveAs(myFnameXlsx);
                }//end of using xlsx file
            }//end of try
            catch (Exception e)
            {
                Console.WriteLine(e);
                Console.WriteLine("error! \n usage: csv2xlsx.exe file.csv");
                Console.ReadKey();
                return;
            }//end of catch
        }//end of Main

    }//end of class
}//end of namespace