Group.DeleteGroup C# (CSharp) Method

    public void DeleteGroup()
    {
    }

        private void buttonRemoveGroup_Click(object sender, EventArgs e)
        {
            try
            {
                int idx = remove_cb.SelectedIndex;
                if (idx < 0)
                {
                    return;
                }
                int id      = Convert.ToInt32(group.GetAllGroup().Rows[idx][0]);
                int user_id = CurrentUser.Id;

                if (group.DeleteGroup(id, user_id))
                {
                    MessageBox.Show("Remove Successfully", "Remove Group", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    remove_cb.Text = "";
                }
                else
                {
                    MessageBox.Show("You are not the owner of this group!", "Remove Group", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                }
                refresh();
            }
            catch
            {
                MessageBox.Show("Empty Field", "Remove Group", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                throw;
            }
        }