Add rows to DataGridView bound from XML File?

Hi there,

OK, so I've read this same question asked over and over but all the answers talk about adding rows to the datatable that is bound to the dataset.  So, in my case, I can't find any code where I am creating a datatable.   I do create a DataSet but not a datatable.  I can delete a row (see below) but my dataset does not have an addnew method.

private DataSet AddressBookDataSet = new DataSet();
        private string strAddressBookPath = "P:\\Visual Studio\\Projects\\SecureSend\\AddressBook.xml"

 public AddressBook()
        {
            InitializeComponent();
            datagridaddressbook.DataBindingComplete += new DataGridViewBindingCompleteEventHandler(datagridaddressbook_DataBindingComplete);
            datagridaddressbook.CellClick += new System.Windows.Forms.DataGridViewCellEventHandler(datagridaddressbook_CellClick);
            DataGridViewCellStyle cell_style = new DataGridViewCellStyle();
            cell_style.BackColor = Color.LightGreen;
            cell_style.Format = "C2";
            AddressBookDataSet.ReadXml(strAddressBookPath);
            datagridaddressbook.DataSource = AddressBookDataSet;
            datagridaddressbook.DataMember = "details";
            datagridaddressbook.Columns[0].DefaultCellStyle = cell_style;
            datagridaddressbook.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            datagridaddressbook.Columns[0].HeaderText = "Email";
            datagridaddressbook.Columns[1].HeaderText = "First Name";
            datagridaddressbook.Columns[2].HeaderText = "Last Name";
            datagridaddressbook.Columns[3].HeaderText = "Company";
            txtEmail.Focus();
       }
private void btnDelete_Click(object sender, EventArgs e)
        {
            if (datagridaddressbook.SelectedRows.Count > 0)
            {
                int selectedRowCount = this.datagridaddressbook.SelectedRows.Count;

                while (selectedRowCount > 0)
                {
                    DataGridViewRow dgv_r = this.datagridaddressbook.SelectedRows[0];
                    this.datagridaddressbook.Rows.Remove(dgv_r);
                    selectedRowCount--;
                }
                AddressBookDataSet.WriteXml(strAddressBookPath);
                AddressBookDataSet.AcceptChanges();

            }
            else
            {
                MessageBox.Show("Please select a contact to delete", "No contact selected", MessageBoxButtons.OK);
            }

        }

Any help would be greatly appreciated...

Thanks, Chris