How to remove right side empty space in ToolStripMenuItem

Question

In screenshot i marked that empty space with green rectangle, i want left and right space to be equal size in ToolStripMenuItem but right side have bigger empty area which i can't remove.

Codes:

    private void UpdateWorkflowsMenu()
    {
        ((ToolStripDropDownMenu)tsddbWorkflows.DropDown).ShowImageMargin = false;

        tsddbWorkflows.DropDownItems.Clear();

        Program.HotkeyManager.Hotkeys.ForEach<HotkeySettings>(x =>
        {
            if (x.TaskSettings.Job != HotkeyType.None && (!Program.Settings.WorkflowsOnlyShowEdited || !x.TaskSettings.IsUsingDefaultSettings))
            {
                ToolStripMenuItem tsmi = new ToolStripMenuItem(x.TaskSettings.Description);
                if (x.HotkeyInfo.IsValidHotkey) tsmi.ShortcutKeyDisplayString = " " + x.HotkeyInfo.ToString();
                tsmi.Click += (sender, e) => HandleTask(x.TaskSettings);
                tsddbWorkflows.DropDownItems.Add(tsmi);
            }
        });

        tsddbWorkflows.Visible = tsddbWorkflows.DropDownItems.Count > 0;
    }

Answer 1

VB version (actually there are 18 pixels for arrow: 10 for size and 8 for margin, leave 2 pixels for margin)

Parent.DropDown.GetType.GetField("ArrowPadding", 
Reflection.BindingFlags.NonPublic Or 
Reflection.BindingFlags.Static).SetValue(Nothing, New Padding(0, 0, -16, 0))