how to hide or invisible sub menu from menu strip in master

Oct 7 2014 7:57 AM

how to hide or invisible sub menu from menu strip in master page in ASP.net and C#?
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i have menu strip, so admin can view all menus and sub-menus,
another one is user, but he/she can't view all sub-menus from menu,
so how can i prevent user to prohibit from this ??