gistfile1.txt

public static bool sendAuthorizedHttpRequest(string server, string functionUrl, string command, string apiKey, string apiSecret, byte[] data)
{
    try
    {
        using (var client = new System.Net.WebClient())
        {
            AddAuthroizationHeader(client, apiKey, apiSecret);
            client.UploadData(server + functionUrl, command, data);
        }
        return true;
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.ToString());
        return false;
    }
}

private static void AddAuthroizationHeader(WebClient client, string key, string secret)
{
    var encodedCredentials = Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(String.Format("{0}:{1}", key, secret)));
    var authString =  String.Format("Basic {0}", encodedCredentials);
    client.Headers.Add(HttpRequestHeader.Authorization, authString);
}