显示ContextMenuStrip而不显示在任务栏中

contextMenuStrip1.ShowItemToolTips = false;
contextMenuStrip1.ShowImageMargin = false;
contextMenuStrip1.RenderMode = ToolStripRenderMode.System;
contextMenuStrip1.BackColor = SystemColors.Control;
contextMenuStrip1.ForeColor = SystemColors.ControlText;

contextMenuStrip1.ShowItemToolTips = true;
contextMenuStrip1.ShowImageMargin = true;
contextMenuStrip1.RenderMode = ToolStripRenderMode.ManagerRenderMode;
contextMenuStrip1.BackColor = Color.White;
contextMenuStrip1.ForeColor = Color.Black;