DataSet ds = new DataSet();
        private void Form1_Load(object sender, EventArgs e)
        {
            ds.ReadXml("Data.xml");
            dataGridView1.DataSource = ds.Tables[0];
        }

        private void button1_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.RemoveAt(rIndex);
        }
        int rIndex;
        private void dataGridView1_RowEnter(object sender, DataGridViewCellEventArgs e)
        {
            rIndex = e.RowIndex;
        }