private void button1_Click(object sender, EventArgs e)
        {
            InsertForm insert = new InsertForm();

            insert.ShowDialog();
            LoadTable();
        }
 private void button2_Click(object sender, EventArgs e)
 {
     if (dataGridView1.SelectedRows.Count > 0)
     {
         InsertForm update = new InsertForm();
         update.textBox1.ReadOnly = true;
         update.button2.Enabled   = false;
         update.button1.Text      = "Update";
         update.textBox1.Text     = dataGridView1.SelectedRows[0].Cells[0].Value.ToString();
         update.textBox2.Text     = dataGridView1.SelectedRows[0].Cells[1].Value.ToString();
         update.textBox3.Text     = dataGridView1.SelectedRows[0].Cells[2].Value.ToString();
         update.ShowDialog();
         LoadTable();
     }
     else
     {
         MessageBox.Show("Please Select the entire Row ");
     }
 }