We need to do SEO redirect for urls like:
//////controller/action
to
/controller/action
Request.Url and Request.RawUrl doesn't have '////' part, it shows only one slash.
What you are looking for is Request.ServerVariables["HTTP_URL"].
If you are using IIS7 or above you may want to look at using the IIS Rewrite Module, which will allow you write a regex to catch URLs with multiple forward slashes and redirect them. This will save you having to write code to do it.
http://learn.iis.net/page.aspx/460/using-the-url-rewrite-module/