private void _buttonPositive_Click(object sender, EventArgs e)
        {
            //Check UserInput
            if (_editOldPassword.Text == string.Empty)
            {
                Toast.MakeText(Activity, GetString(Resource.String.EmptyUserPassword), ToastLength.Short).Show();
                return;
            }
            if (_editNewPassword.Text == string.Empty)
            {
                Toast.MakeText(Activity, GetString(Resource.String.EmptyUserPassword), ToastLength.Short).Show();
                return;
            }
            if (_userDataBase.CheckUserPassword(MainActivity.UserName, _editOldPassword.Text) == false)
            {
                Toast.MakeText(Activity, GetString(Resource.String.WrongUserPassword), ToastLength.Short).Show();
                return;
            }

            //UserPassword correct
            User user = new User()
            {
                // Deactivated local User Database
                // Id = MainActivity.UserId,
                UserName     = _editUserName.Text,
                UserPassword = _editNewPassword.Text
            };

            _userDataBase.UpdateTableUser(user);
            MainActivity.UserName = _editUserName.Text;

            //Event For Change Complete
            // ReSharper disable once PossibleNullReferenceException
            ChangeUserDataComplete.Invoke(this, EventArgs.Empty);

            //Close Dialog
            Activity.OnBackPressed();
            Dismiss();
        }