Its simple.Please go as follows:-
1.Create MDI Form.
2.take menu strip control on it, set following properties of menustrip
menuStrip1.Dock = DockStyle.Left;
menuStrip1.layoutStyle=VerticalStackWithOverflow;
3.make use of backgroundImage, padding & font property of menustrip to give look as you like.
4.for each menustrip item_click load specific child form in MDI.also set
Form1.Dock = DockStyle.Fill;