解决界面卡死的问题

private void textBox2_TextChanged(object sender, EventArgs e)
{
    int count = dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Visible);
    label2.Text = "on";
    Thread objThread = new Thread(new ThreadStart(delegate
    {
        string Temp = textBox2.Text.Trim();
        for (int i = 0; i < count - 1; i++)
        {
            if (!dataGridView1.Rows[i].Cells[0].Value.ToString().ToUpper().Contains(Temp))
            {
                dataGridView1.Rows[i].Visible = false;
            }
        }
    }));
    objThread.Start();
}

Control.CheckForIllegalCrossThreadCalls = false;