I am trying to implement Facebook and Twitter login in Xamarin android for my application. While calling the StartActivity() method to present the Facebook and twitter UI for the user authentication. I am getting the exception as shown in the attached image. Please find my code below in MainActivity.cs.
public void FacebookLogin()
var auth = new OAuth2Authenticator(
authorizeUrl: new Uri("https://m.facebook.com/dialog/oauth/"),
redirectUrl: new Uri("http://www.facebook.com/connect/login_success.html"));
auth.AllowCancel = true;
auth.Completed += FacebookAuth_Completed;
Please let me know how to resolve this.