using System;

public class Program

{

  static string JustPathNoFilename(string s) {

    System.Uri uri = new System.Uri(s);

    string path = uri.AbsolutePath;

    string pathWithoutFilename = System.IO.Path.GetDirectoryName(path);

    return pathWithoutFilename;

  }

    public static void Main()

    {

        Console.WriteLine(JustPathNoFilename("http://foo.com/bar/moo.png"));

        Console.WriteLine(JustPathNoFilename("http://foo.com/bar/moo%2epng"));

        Console.WriteLine(JustPathNoFilename("http://foo.com/bar/moo.png#not.this"));

        Console.WriteLine(JustPathNoFilename("http://foo.com/bar/moo.png?key=not.this"));

        Console.WriteLine(JustPathNoFilename("http://foo.com/bar/moo.png#sub/not.this"));

        Console.WriteLine(JustPathNoFilename("http://foo.com/bar/moo.png?key=sub/not.this"));

    }

}