protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); SetContentView(Resource.Layout.Settings); var email = FindViewById <EditText>(Resource.Id.etEmail); var buttonBack = FindViewById <Button>(Resource.Id.btnBackMap); var buttonSave = FindViewById <Button>(Resource.Id.btnSave); buttonBack.Click += (s, e) => { var nextActivity = new Intent(this, typeof(MainActivity)); StartActivity(nextActivity); }; buttonSave.Click += async(s, e) => { var service = new SettingsService(); await service.ChangeSetting("email", email.Text); var nextActivity = new Intent(this, typeof(MainActivity)); StartActivity(nextActivity); }; }