What is the difference between Request.RawUrl and Request.Url in ASP.NET?
From MSDN:
The raw URL is defined as the part of the URL following the domain information. In the URL string
http://www.contoso.com/articles/recent.aspx, the raw URL is/articles/recent.aspx.
This means, you can use rawurl and do not have to care about through which address the server was called (for instance http://yourserver/ or http://yourserver.yourdomain.com/ if you have multiple interfaces.)
However, the URL property of an HTTPRequest object returns a System.URI object, which also contains server name.