title: Using c# characters in form url encoded request in flurl
body: <p>Does anyone know how to send a field with brackets by a url encoded form using flurl?</p>
  
  <p>Example: I want to send the foo[bar] field with the "foo" value like this</p>
  
  <pre><code>var response = await "https://server/request"
      .WithHeader("Header1", "headerValue")
      .PostUrlEncodedAsync(new
      {
           foo[bar] = "foo"
      })
  </code></pre>