Fix and start the prograssbar

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Prograssbarcompltshutdown
{
    public partial class Form1 : Form
    {
        ProgressBar p = new ProgressBar();
        public Form1()
        {
            InitializeComponent();
        }

      

        private void button1_Click(object sender, EventArgs e)
        {
           
            p.Location = new System.Drawing.Point(100, 200);
            p.Name = "progressbar";
            p.Width = 500;
            p.Height = 30;

           
            p.Minimum = 0;
            p.Maximum = 300;
            //p.Value = 70;


            Controls.Add(p);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 300; i++)
            {
                for (int j=0;j<1000000;j++)
                p.Value = i;

            }

            if (p.Value ==299)
            {
                MessageBox.Show("Now Completed");
              
            }
        }


    }
}