Question

In .NET 4.0, whats the equivalent function to IO.Path.GetFileName for urls?

Answer 1

The Uri class is your friend.

Provides an object representation of a uniform resource identifier (URI) and easy access to the parts of the URI.

IsFile will try to determine if the Uri does indeed point to a file.

Use the Segements property in order to get the file name (it will be the last segment).

Uri uri = new Uri("http://example.com/title/index.htm");
var filename = uri.Segments[uri.Segments.Length - 1];
// filename == "index.htm"