You can switch the menu style of SharpDevelop to one of the following three options:
To change the menu style, follow these steps:
Select the Tools->Options menu item. This opens the Options dialog box. Switch to the Menu Style option panel:
The options are selected via a radio button group. Images next to the option show you the visual effect of your choice.
Click OK to close the dialog box.
Restart SharpDevelop for the changes to take effect.