How to highlight the gridview row based on condition

GridView

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns = "False"
            Font-Names = "Arial" OnRowDataBound = "OnRowDataBound">
            <Columns>
                <asp:BoundField DataField = "Item" HeaderText = "Item" />
                <asp:BoundField DataField = "Price" HeaderText = "Price" />
            </Columns>
        </asp:GridView>

Code

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {

        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Item"), new DataColumn("Price") });
        dt.Rows.Add("Shirt", 200);
        dt.Rows.Add("Football", 30);
        dt.Rows.Add("Bat", 22.5);
        dt.Rows.Add("Ring", 25);
        dt.Rows.Add("Band", 77);
        dt.Rows.Add("Glass", 57);
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        if (Convert.ToDouble(e.Row.Cells[1].Text) > 50.0)
        {
            e.Row.Attributes["style"] = "background-color:red";
        }
    }
}

Output