title: RestSharp send Dictionary
body: <p>I've seen how to deserialize a dictionary from the response, but how do you send one?</p>
  
  <pre><code>var d = new Dictionary&lt;string, object&gt; {
      { "foo", "bar" },
      { "bar", 12345 },
      { "jello", new { qux = "fuum", lorem = "ipsum" } }
  };
  
  var r = new RestRequest(url, method);
  r.AddBody(d); // &lt;-- how?
  
  var response = new RestClient(baseurl).Execute(r);
  </code></pre>