private void ddlOrganization_DrawItem(object sender, DrawItemEventArgs e)
    {
        string text = ddlOrganization.GetItemText(ddlOrganization.Items[e.Index]);
        e.DrawBackground();
        using (SolidBrush br = new SolidBrush(e.ForeColor))
        {
            e.Graphics.DrawString(text, e.Font, br, e.Bounds);
        }
        if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
        {
            toolTip1.Show(text, ddlOrganization, e.Bounds.Right, e.Bounds.Bottom);
        }
        e.DrawFocusRectangle();
    }