PHP Array to C# String

In my application, a resquest is sent to a PHP server from a C# application. The application sends details the author name via POST. I want the PHP application to query a database and return, ideally, an array of the authors details:

C#

        String result = "";
        string url = LINK_TO_SITE;
        using (WebClient client = new WebClient())
        {
            NameValueCollection postData = new NameValueCollection()
            {
                {"Author", Properties.Settings.Default.Author}               

            };
            result = Encoding.UTF8.GetString(client.UploadValues(url, postData));
            MessageBox.Show(result);

php

    $author=$_POST["author"];   
    $stmt = $mysqli->stmt_init();
    $stmt = $mysqli->prepare("SELECT name, date, code FROM Collab where Members=?");    
    $stmt->bind_param('s', $author);
    $stmt->execute();       
    $stmt->bind_result($name,$date, $code);

I can retrive the details fine. Now, how will I put the data into an array that can be sent back to C#?

So basically...How do I get a PHP array to work in C#?