using System;

using System.Web;

using System.Collections.Specialized;

​

public class Test

{

    public static void Main()

    {

        String q = "a=b;c=d;";

        NameValueCollection qscoll = HttpUtility.ParseQueryString(q);

        foreach (String s in qscoll.AllKeys){

            Console.WriteLine(s + " : " + qscoll[s]);

        }

    }

}