title: Asp.net specific Mvc Routing
body: <p>My url is as follow: www.example/videos/category1,category2,category3/sex/hospital/doctor But in my url category1 and category2 and category3(may be 1 or too many) can be null/empty. Also sex or hospital or doctor also can be null. How can i detect which one is null. If categories is null. Then mvc sense sex as categories and hospital as sex. What kind of approach i can use?</p>