change cell color of GRIDVIEW based on system date

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            DateTime date = Convert.ToDateTime(GridView1.Rows[i].Cells[0].Text);
            if (date < DateTime.Now)
            {
                GridView1.Rows[i].Cells[0].BackColor = System.Drawing.Color.Red;
            }
            
        }
    }

 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {

if (e.Row.RowType == DataControlRowType.DataRow)
      {
          
          DateTime Stock =
           Convert.ToDateTime(DataBinder.Eval(e.Row.DataItem,
           "Column_Name"));
          if(Stock > DateTime.Now)
          e.Row.BackColor =System.Drawing.Color.Red;

      }
    }

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {       
            DateTime expdate = Convert.ToDateTime(e.Rows.Cells[8].Text.Trim());
            if (expdate < DateTime.Now)
            {
                e.Rows.Cells[8].BackColor = System.Drawing.Color.Red;
            }       
    }