c# double time confirm message step by step

This is A C# Practice code:

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 System.Data.SqlClient;


namespace database
{
    public partial class DoubleConfirmation : Form
    {
        public DoubleConfirmation()
        {
            InitializeComponent();
        }
        SqlConnection conns = new SqlConnection("Data Source=.;Initial Catalog=dataentry;Integrated Security=True;Pooling=False");
        private void label2_Click(object sender, EventArgs e)
        {
           
        }


        private void button1_Click(object sender, EventArgs e)
        {
            conns.Open();
            SqlDataAdapter sdaa = new SqlDataAdapter("insert into LOGINWINDOW (username,pass) values ('" + textBox4.Text + "','" + textBox3.Text + "')", conns);
            sdaa.SelectCommand.ExecuteNonQuery();
            conns.Close();
            display();
        }


        private void button2_Click(object sender, EventArgs e)
        {
            DialogResult del = MessageBox.Show("Are you sure Want to Delete","Delete",MessageBoxButtons.YesNo, MessageBoxIcon.Question);


            if (del == DialogResult.Yes)
            {
                DialogResult confim=MessageBox.Show( "You Delete Confirmlly...!!","Confirm Delete",MessageBoxButtons.YesNoCancel,MessageBoxIcon.Question,MessageBoxDefaultButton.Button2);
                if (confim == DialogResult.Yes)
                {
                    SqlDataAdapter asd = new SqlDataAdapter("delete from LOGINWINDOW where username='" + textBox4.Text + "'", conns);
                    DataTable data = new DataTable();
                    asd.Fill(data);
                    display();
                }
                if (confim == DialogResult.No)
                {
                    MessageBox.Show("Not Delete Any Records", "Not Confirm Delete", MessageBoxButtons.OK, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);


                }
                if (confim == DialogResult.Cancel)
                {
                    MessageBox.Show(" Delete Canceld", "Cancel", MessageBoxButtons.OK, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);


                }
            }
            else
            {
                MessageBox.Show("Not Delete Any Records", "Not Delete", MessageBoxButtons.OK, MessageBoxIcon.Information);


            }
            
         
        }
        void display()
        {
            SqlDataAdapter dis = new SqlDataAdapter("select * from LOGINWINDOW", conns);
            DataTable ss = new DataTable();
            dis.Fill(ss);
            dataGridView1.DataSource = ss;


        }


        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {


        }
    }
}

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