use this class
public static class ExtensionMethods
{
public static void DoubleBuffered(this DataGridView dgv, bool setting)
{
Type dgvType = dgv.GetType();
PropertyInfo pi = dgvType.GetProperty("DoubleBuffered", BindingFlags.Instance | BindingFlags.NonPublic);
pi.SetValue(dgv, setting, null);
}
}
and enter this code.
this.dataGridView1.DoubleBuffered(true);
enjoy.