How can I clear rows in DataGridView with C#?

Question

Following Error in this line.

datagridview1.Rows.Clear()

but this line gives error:

Cannot clear this list.

Answer 1

private void button_Limpar_Click(object sender, EventArgs e)
{
    DataTable DT = (DataTable)dataGridView_Cidade.DataSource;
    if (DT != null)
        DT.Clear();
}
#endregion