using System;

​

public class Program

{

    public static void Main()

    {

        Uri uri = new Uri("http://showroom.auction123.com/classic_bmw_mini/index.html");

        Console.WriteLine(uri);

        Console.WriteLine(uri.AbsolutePath);

        Console.WriteLine(uri.AbsoluteUri);

        var stringUri = uri.ToString().Replace("index.html", "");

        Console.WriteLine(stringUri);

        //http://showroom.auction123.com/classic_bmw_mini/json/GetSummaryJson

    }

}