title: How to send POST request in Xamarin?
body: <p>I've built my backend in rails.
  My email address is "sample@zmail.com" and it's already registered. The password is "28902890" here</p>
  
  <p>After giving the following command in terminal </p>
  
  <pre><code>curl -v -H 'Content-Type: application/json' -H 'Accept: application/json' -X POST https://auth-agdit.herokuapp.com/api/v1/sessions -d "{\"user\":{\"email\":\"sample@zmail\",\"password\":\"28902890\"}}"
  </code></pre>
  
  <p>I get this response from my backend,</p>
  
  <pre><code>{"success":true,"info":"Logged in :) ","data":{"authentication_token":"iexGFwJ6HwERQZ3wJ4NG"}}
  </code></pre>
  
  <p>Now I need to get this data from my Android app.
  I can get json by using WebClient().downloadString() method for simple json where authentication is not needed and the request method is GET.</p>
  
  <p>Now I need to get the output Json for POST method.
  How can I accomplish that?</p>