BTW, the best way to do a conditional color setting in LS beta 2 is to use the new SetBinding method. 

For example:

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

 

This will assign the background color to Orange when the value is great than 20.  With this code, we don't have to write extra code to monitor when the value is changed, and change the color again.