using System;

using System.Web;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string consumerId = "m!ch@3l*";

        // here's the encoding you have to do:

        string urlValue = HttpServerUtility.UrlTokenEncode(Encoding.UTF8.GetBytes(consumerId));

        // then, when you build a URL, you have to add "encoded=true" query string

        Console.WriteLine("{0,-35}{1}", "Consumer ID:", consumerId);

        Console.WriteLine("{0,-35}{1}", "Invalid URL To Consumer Service:", "https://consumer.healthwise.net/"+consumerId);

        Console.WriteLine("{0,-35}{1}", "URL-safe ConsumerID:", urlValue);

        Console.WriteLine("{0,-35}{1}", "Valid URL to Consumer Service", "https://consumer.healthwise.net/"+urlValue+"?encoded=true");

        Console.WriteLine("{0,-35}{1}", "To Get Prescriptions, for example:", "https://consumer.healthwise.net/"+urlValue+"/prescriptions?encoded=true");

    }

}