Add TextBox Values in Gridview Using Enter KEY

void TextBox1KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == (char) 13)
    {
        {
            string dates = textBox1.Text.ToString(); // assign the Textbox value to a string
            int i = dataGridView1.Rows.Count; // count the Number of available rows in the GridView
            int j = i - 1; //counted the Rows minus 1 that will make you add Rows
            this.dataGridView1.Rows.Add(); // create the Rows if it is needed
            dataGridView1.Rows[j].Cells[0].Value = dates; // add the Values to the GridView
            textBox1.Text = ""; //Empty the Textbox
        }
    }