get all the data in datagridview

private void button1_Click(object sender, EventArgs e)
{
string[] DataResult1 = { textBox1.Text, textBox2.Text};
dataGridView1.Rows.Add(DataResult1);
}

private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.Columns.Add("colName", "Name");
dataGridView1.Columns.Add("colSurName", "Last Name");
}

how would i get all the data in the datagridview per row?
tnx