Row color for datagridview

Question

        i have a datagridview and bing datas to datagridview

datagridview1.DataSource = datasetNew.Tables[0];

datagridview1.Columns["StartDate"].Width = 90;

datagridview1.Columns["CloseDate"].Width = 90;

datagridview1.Columns["IsClosed"].Width = 50;

datagridview1.Columns["Description"].Width = 240;

datagridview1.Columns[

for(int j = 0; j < dgvDbList.ColumnCount; j++)

{

dgvDbList[

}

"StartDate", j].Style.BackColor = Color.Gray;

but the backColor not working

please help me

"DatabaseName"].Visible = false;