gridview

iam taking first value of label and comparing with rest of values if it is same then i want to change the color of that row.
but what is happening is entire gridview backcolor is changing to red.

i want to change only those rows which matches.

void GridView1_DataBound(object sender, EventArgs e)
{
foreach (GridViewRow gv in GridView1.Rows)
{

Label lbl = (Label)gv.Cells[2].Controls[0].FindControl("Label1");
string t = lbl.Text;
for (int i = 0; i < GridView1.Rows.Count; i++)
{
Label lbl4 = (Label)GridView1.Rows[i].Cells[2].Controls[0].FindControl("Label1");
if (t == lbl4.Text)
{
GridView1.Rows[i].Cells[2].BackColor = System.Drawing.Color.Red;

//gv.BackColor = System.Drawing.Color.Red;

}

}

}

}Please, move this to appropriate forum.