using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {  //creating string object for url wth querystring(for simplicity just i 
         //assigned the string value...
        string uri1 = "http://www.dotnetspider.com/?id=120101&name=krishnavenikaladi";
       //creating uriobject
        Uri weburi = new Uri(uri1);
       //querying uri object
        string query = weburi.Query;
//returning url without querystring by using substring ()of immutable string class
        string weburl = uri1.Substring(0, uri1.Length - query.Length);
        Response.Write(weburl);
    }
}