How to align separator in ContextMenuStrip

c#, winforms

Solution

You should use `Paint` event (msdn):

...
ToolStripSeparator stripSeparator = new ToolStripSeparator();                   
stripSeparator.Paint += stripSeparator_Paint;
_menuStrip.Items.Add(stripSeparator);
...

Paint event handler:

void stripSeparator_Paint(object sender, PaintEventArgs e)
{
    ToolStripSeparator stripSeparator = sender as ToolStripSeparator;
    ContextMenuStrip menuStrip = stripSeparator.Owner as ContextMenuStrip;
    e.Graphics.FillRectangle(new SolidBrush(Color.Transparent), new Rectangle(0, 0, stripSeparator.Width, stripSeparator.Height));
    using (Pen pen = new Pen(Color.LightGray, 1))
    {
        e.Graphics.DrawLine(pen, new Point(23, stripSeparator.Height / 2), new Point(menuStrip.Width, stripSeparator.Height / 2));
    }
}

Problem

Here is my code for ContextMenuStrip: ``` ContextMenuStrip _menuStrip = new ContextMenuStrip(); Image image = new Bitmap("icon_main.ico"); _menuStrip.Items.Add("First item", image); ToolStripSeparator stripSeparator1 = new ToolStripSeparator(); stripSeparator1.Alignment = ToolStripItemAlignment.Right;//right alignment _menuStrip.Items.Add(stripSeparator1); _menuStrip.Items.Add("Second item", image); ToolStripSeparator stripSeparator = new ToolStripSeparator(); stripSeparator.Alignment = ToolStripItemAlignment.Left;//left alignment _menuStrip.Items.Add(stripSeparator); _menuStrip.Items.Add("Exit", image, OnClickExit); _mainIcon.ContextMenuStrip = _menuStrip; ``` Strange thing is that separators are not aligned - I have a little space between edge of ContextMenuStrip and separator, even if I try to align the separator (I've tried both - left and right alignment): It's not a big graphical failure, but I'm asking myself how this can be aligned perfectly: Any ideas what should I do?

Original source