Error Edit Button:-Index was out of range. Must be non-negative and less than the size of the collection.

private void button1_Click(object sender, EventArgs e)
       {
           int i;
           i = dataGridView2.SelectedCells[0].RowIndex;
           textBox10.Text = dataGridView1.Rows[i].Cells[1].Value.ToString();
           textBox11.Text = dataGridView1.Rows[i].Cells[2].Value.ToString();
           textBox12.Text = dataGridView1.Rows[i].Cells[3].Value.ToString();
           textBox13.Text = dataGridView1.Rows[i].Cells[4].Value.ToString();
           textBox14.Text = dataGridView1.Rows[i].Cells[5].Value.ToString();
           textBox15.Text = dataGridView1.Rows[i].Cells[6].Value.ToString();
           textBox16.Text = dataGridView1.Rows[i].Cells[7].Value.ToString();
           textBox17.Text = dataGridView1.Rows[i].Cells[8].Value.ToString();
           textBox18.Text = dataGridView1.Rows[i].Cells[9].Value.ToString();
           textBox19.Text = dataGridView1.Rows[i].Cells[10].Value.ToString();
           textBox20.Text = dataGridView1.Rows[i].Cells[11].Value.ToString();
           textBox21.Text = dataGridView1.Rows[i].Cells[12].Value.ToString();

       }