using System.Windows.Forms; static class Program { static void Main() { Application.Run(new Form1()); } } class Form1 : Form { public Form1() { var menuStrip1 = new MenuStrip(); var fileToolStripMenuItem = new ToolStripMenuItem(); menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem }); for (int i = 0; i < 10; i++) { var item = new ToolStripMenuItem("Item" + i.ToString()); fileToolStripMenuItem.DropDownItems.Add(item); if (i < 5) item.Visible = false; } fileToolStripMenuItem.Text = "File"; Controls.Add(menuStrip1); MainMenuStrip = menuStrip1; } }