using System;

using System.Security.Cryptography;

using System.Text;

using System.Web;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(createToken("parkly-dev.servicebus.windows.net", "RootManageSharedAccessKey", ""));

    }

    private static string createToken(string resourceUri, string keyName, string key)

{

    TimeSpan sinceEpoch = DateTime.UtcNow - new DateTime(1970, 1, 1);

    var week = 60 * 60 * 24 * 7;

    var expiry = Convert.ToString((int)sinceEpoch.TotalSeconds + week);

    string stringToSign = HttpUtility.UrlEncode(resourceUri) + "\n" + expiry;

    HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(key));

    var signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));

    var sasToken = String.Format(CultureInfo.InvariantCulture, "SharedAccessSignature sr={0}&sig={1}&se={2}&skn={3}", HttpUtility.UrlEncode(resourceUri), HttpUtility.UrlEncode(signature), expiry, keyName);

    return sasToken;

}

}