A context menu is a floating menu that can pop up wherever it's needed for selections in a particular editing or user interface context. The convention is for the context menu to appear in response to a right-mouse button click.
Windows Forms follows this convention. The application has a ContextMenu property that, like its MainMenu counterpart, is available from the top-level application form.
Adding, showing, or modifying the appearance of a context menu and specifying its handler are largely the same as the main menu. The following adds a context menu with three items to the main window of the resize.cs form:
ContextMenu cmenu = new ContextMenu();
cmenu.MenuItems.Add(new MenuItem("&First"));
cmenu.MenuItems.Add(new MenuItem("&Second"));
cmenu.MenuItems.Add(new MenuItem("-"));
cmenu.MenuItems.Add(new MenuItem("&Third"));
this.ContextMenu=cmenu;
A simple right mouse click will bring up the context menu.
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