ToolStripContainer control is a container of ToolStrip. ToolStripContainer allows more than one ToolStrip control in side ToolStripContainer.
Drag and drop ToolStripContainer control from toolbox on the window Form.
Panel on each side of the Form can contain only MenuControl (ToolStrip, MenuStrip or StatusStrip). Central panel of ToolStripContainer can contain one or more other controls.
Expand the panel in which u want to add ToolStrip.
Run the project
When you click top panel menuStrip then top menu will show
When you click left panel ToolStrip then left menu will show.