title: Xamarin forms signature pad Get image
body: <p>Im using the following code to get the signature from the signature pad, But any value doesn't come.</p>
  
  <pre><code>try {
              var signature = padView.GetImage (Acr.XamForms.SignaturePad.ImageFormatType.Png);
              using (BinaryReader br = new BinaryReader (signature)) {
                  var result = br.ReadBytes ((int)signature.Length);
  
              }
  
          } catch (Exception ex) {
              //              Helper_ErrorHandling.SendErrorToServer (ex);
          }
  </code></pre>
  
  <p>Am I ding it wrong, Also how do i convert this to a base64 string
  ?</p>