Import Data From txt to sql from c#

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

namespace copiareDaFile
{
    class Program
    {
        static void Main(string[] args)
        {

            string fn = Environment.GetFolderPath(Environment.SpecialFolder.Desktop)+@"\dati2.txt";
            string[] arrLines = File.ReadAllLines(fn);
            SqlConnection cnn = new SqlConnection("...");
            cnn.Open();
            for (int i = 1; i < arrLines.Length; i++)
            {
                string[] arr = arrLines[i].Split(';');

                string n = arr[0];
                string c = arr[1];

                string s = "INSERT INTO TempCN(Nome,Cognome) VALUES(@Nome,@Cognome)";

                SqlCommand cmd = new SqlCommand(s, cnn);
                cmd.Parameters.AddWithValue("@Nome", n);
                cmd.Parameters.AddWithValue("@Cognome",c);
                cmd.ExecuteNonQuery();

                //SqlCommand cmd2 = new SqlCommand("TempCN_INS", cnn);
                //cmd2.CommandType = CommandType.StoredProcedure;

                //cmd2.Parameters.AddWithValue("@Nome", n);
                //cmd2.Parameters.AddWithValue("@Cognome", c);
                //cmd2.ExecuteNonQuery();
            }
            cnn.Close();
        }
    }
}