i want to display a text file in mysql... its showing null id not allowed.. what to do.. help

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using MySql.Data.MySqlClient;
using System.IO;

namespace texttodb3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string[] lines = File.ReadAllLines("c:Users\\Techsoft\\Desktop\\db.txt");
            foreach (var line in lines)
            {
                var data = line.Split(new[] { ',' }, 4);
                int Id = int.Parse(data[0].Trim());
                int age = int.Parse(data[1].Trim());

                string name = data[2].Trim();
                StoreRecord(Id, age, name);
            }

        }
        private void StoreRecord(int Id, int age, string name)
        {
            var conStr = "server=localhost; database=neww; password=techsoft; User Id=root;";
            using (var connection = new MySqlConnection(conStr))
            using (var command = connection.CreateCommand())
            {
                connection.Open();
                command.CommandText =
                @"INSERT INTO neww
            (Id, age, name)
          VALUES
            (@Id, @age, @name)";
                command.Parameters.AddWithValue("@Id", Id);
                command.Parameters.AddWithValue("@age", age);
                command.Parameters.AddWithValue("@name", name);

                command.ExecuteNonQuery();
            }
        }
    }
}