Code:

private void Form1_Load(object sender, EventArgs e)
        {
            SqlConnection connection = new SqlConnection(@"Data Source=SUN\SQLEXPRESS;Initial Catalog=estrada;Integrated Security=True");
            adapter = new SqlDataAdapter("SELECT * FROM autori", connection);
            SqlCommandBuilder cbuilder = new SqlCommandBuilder(adapter);
            dset = new DataSet();
            adapter.Fill(dset);
            dataGridView1.DataSource = dset.Tables[0];
        }

        private void button1_Click(object sender, EventArgs e)
        {
            adapter.Update(dset);
        }