title: PayPal REST API using Xamarin
body: <p>I am implementing PayPal into my Xamarin Android application. <br />
  I am using <code>OAuth2Authenticator</code> to get the access token, however, I keep getting the </p>
  
  <blockquote>
    <p>Response: Waiting for Activation, Method={null}</p>
  </blockquote>
  
  <p>I have also tried using the PayPal web services as an alternative (<a href="https://www.sandbox.paypal.com/wsdl/PayPalSvc.wsdl" rel="nofollow">https://www.sandbox.paypal.com/wsdl/PayPalSvc.wsdl</a>) but I get an exception on the call: </p>
  
  <blockquote>
    <p>PayPalService.PayPalAPIAASoapBinding PInterface = new
    PayPalService.PayPalAPIAASoapBinding ();</p>
  </blockquote>
  
  <p>I have added myself as a developer on the client's PayPal account. Any help would be appreciated.</p>