C# - How to Import multiple text files to SQL Server Table by using C Sharp

CREATETABLE dbo.TechBrothersITCourse (
    id INT
    ,CourseName VARCHAR(100)
    )

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Data.SqlClient;

namespace TechBrothersIT.com_CSharp_Tutorial
{
class Program
    {
staticvoid Main(string[] args)
        {

try
            {

//Declare Variable and set values
//provide input folder
string SourceFolder = @"C:\Source\";
                //provide the extension of files you would like to read
                string FileExtension = ".txt";
                //provide the table name in which you would like to load data
                string TableName = "dbo.TechBrothersITCourse";
                //provide the file delimiter such as comma,pipe
                string filedelimiter = ",";
                //provide the Archive folder where you would like to move file
                string ArchiveFodler = @"C:\Archive\";

                //Create Connection to SQL Server
                SqlConnection SQLConnection = new SqlConnection();
                SQLConnection.ConnectionString = "Data Source = (local); Initial Catalog =TechBrothersIT; "
                   + "Integrated Security=true;";

                // get files from folder according to file extension 
                string[] fileEntries = Directory.GetFiles(SourceFolder, "*" + FileExtension);
                foreach (string fileName in fileEntries)
                {
                    System.IO.StreamReader SourceFile =
                new System.IO.StreamReader(fileName);

                    string line = "";
                    Int32 counter = 0;

                    SQLConnection.Open();
                    while ((line = SourceFile.ReadLine()) != null)
                    {
                        //skip the header row
                        if (counter > 0)
                        {
                            //prepare insert query
                            string query = "Insert into " + TableName +
" Values ('" + line.Replace(filedelimiter, "','") + "')";

//execute sqlcommand to insert record
                            SqlCommand myCommand = new SqlCommand(query, SQLConnection);
                            myCommand.ExecuteNonQuery();
                        }
                        counter++;
                    }

                    SourceFile.Close();
                    SQLConnection.Close();

//Move the file to Archive folder, fileName variable contains complete path for input file.
//Path.GetFileName() to get only the file name from full path
                    File.Move(fileName, ArchiveFodler + Path.GetFileName(fileName));

                }
            }
catch (IOException Exception)
            {
                Console.Write(Exception);
            }
            }

    }
}