lightswitch conditional formatting change color

      Me.FindControl("MyControl").SetBinding(TextBox.BackgroundProperty, "Value", New ColorConverter(), BindingMode.OneWay)

  Public Class ColorConverter
    Implements IValueConverter

    Public Function Convert(value As Object, targetType As System.Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.Convert
      If CType(value, Integer) > 20 Then
        Return New SolidColorBrush(Colors.Orange)
      End If
      Return New SolidColorBrush(Colors.Yellow)
    End Function

    Public Function ConvertBack(value As Object, targetType As System.Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.ConvertBack

      Throw New NotImplementedException()
    End Function
  End Class