Currency format in gridview

<add key="Currency" value="£"/>

using System.Configuration;

CurrenceSymble = ConfigurationManager.AppSettings.Get("Currency");
lblRegFeeCrSybble.Visible = true;
 lblRegFeeCrSybble.Text = CurrenceSymble;

Write this code Gridview Event on RowDataBound

protected void GVInstallment_RowDataBound(object sender, GridViewRowEventArgs e)
 {
 if (e.Row.RowType == DataControlRowType.DataRow)
 {
 // add other details
 priceTotal = Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "Amount"));
 ((Label)e.Row.FindControl("lblAmountgv")).Text =lblRegFeeCrSybble.Text + ' ' + priceTotal;

}

//if(e.Row.RowType == DataControlRowType.DataRow)

//       ((Label)e.Row.FindControl("lblAmountgv")).Text  =((DataRowView)e.Row.DataItem)["Amount"].ToString();

}

<asp:BoundField  DataField="Cost" DataFormatString="{0:c}" HtmlEncode="False" />

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        TableCell statusCell = e.Row.Cells[2];
        if (statusCell.Text == "A")
        {
            statusCell.Text = "Absent";
        }
        if (statusCell.Text == "P")
        {
            statusCell.Text = "Present";
        }
    }
}

public static class Cultures
{
    public static readonly CultureInfo UnitedKingdom = 
        CultureInfo.GetCultureInfo("en-GB");
}

Then:

@price.ToString("C", Cultures.UnitedKingdom)