✅ Conditionally rendering the text and style of a label avalonia

<UserControl>
  <UserControl.Styles>
    <Style Selector="Label"></Style>
    <Style Selector="Label.Success"></Style>
    <Style Selector="Label.Error"></Style>
  </UserControl.Styles>

  <Border>
    <Grid>
      <Grid>
        <Label />
      </Grid>
    </Grid>
  </Border>
</UserControl>

public class LoginViewModel : ViewModelBase
{
    private bool _isSuccess;

    public LoginViewModel() {}

    public bool IsSuccess
    {
        get => _isSuccess;
        set => this.RaiseAndSetIfChanged(ref _isSuccess, value);
    }
}