drop down in title bar of web part

<asp:Menu ID="Menu1" Style="vertical-align: middle;" runat="server" Orientation="Horizontal"
                 OnMenuItemClick="Menu1_MenuItemClick" Target="_self">                 
             </asp:Menu>

Use the above Codings in HTML page.

MenuItem CatItem = new MenuItem();
            CatItem.Text = lblUser.Text;
            CatItem.ToolTip = "UserName";
            CatItem.Value = lblUser.Text;
            CatItem.ImageUrl = "~/Images/User-icon.jpg";
            Menu1.Items.Add(CatItem);

            MenuItem SubcatItem = new MenuItem();
            SubcatItem.Text = "    Clear Screen";
            SubcatItem.ToolTip = "Clear All Fields";
            SubcatItem.Value = "Clear";
            CatItem.ChildItems.Add(SubcatItem);

            MenuItem SubcatItem2 = new MenuItem();
            SubcatItem2.Text = "    View History";
            SubcatItem2.ToolTip = "View History";
            SubcatItem2.Value = "View History";
            CatItem.ChildItems.Add(SubcatItem2);

            MenuItem SubcatItem3 = new MenuItem();
            SubcatItem3.Text = "    Total Processed Count";
            SubcatItem3.ToolTip = "Total Processed Count";
            SubcatItem3.Value = "Total Processed Count";
            CatItem.ChildItems.Add(SubcatItem3);

            MenuItem SubcatItem1 = new MenuItem();
            SubcatItem1.Text = "    LogOut";
            SubcatItem1.ToolTip = "LogOut";
            SubcatItem1.Value = "LogOut";
            CatItem.ChildItems.Add(SubcatItem1);

Provide the above code in Page Load of TitleBar Page

 protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
    {
if (e.Item.Text.Trim() == "View History")
        {
            

        }
        else if (e.Item.Text.Trim() == "Clear Screen")
        {
            Response.Redirect(Request.Url.PathAndQuery, true);
        }
else
{
}
}

use this for Menu events to occur.