How to change the cell style in Silverlight OLAP Grid ?

public partial class MainPage : UserControl
    {
        private IOlapDataProvider dataProvider;
        public object OlapDataManager;
        public MainPage()
        {
            InitializeComponent();
            InitializeConnection();
            this.grid.InternalGrid.QueryCellInfo += new Syncfusion.Windows.Controls.Grid.GridQueryCellInfoEventHandler(InternalGrid_QueryCellInfo);
        }
        private void InitializeConnection()
        {
            Binding customBinding = new CustomBinding(new BinaryMessageEncodingBindingElement(), new HttpTransportBindingElement { MaxReceivedMessageSize = 2147483647 });
            EndpointAddress address = new EndpointAddress("http://bi.syncfusion.com/OlapWcfProject/Services/OlapManager.svc/binary");
            ChannelFactory<IOlapDataProvider> clientChannel = new ChannelFactory<IOlapDataProvider>(customBinding, address);
            dataProvider = clientChannel.CreateChannel();
            OlapDataManager olapDataManager = new OlapDataManager();
            olapDataManager.DataProvider = dataProvider;
            olapDataManager.SetCurrentReport(CreateOlapReport());
            this.OlapDataManager = olapDataManager;
        }
void InternalGrid_QueryCellInfo(object sender, Syncfusion.Windows.Controls.Grid.GridQueryCellInfoEventArgs e)
        {
            e.Style.CellType = "Value";
            e.Style.CellValue = "$234509000.00";
            SolidColorBrush background = new SolidColorBrush(Colors.Cyan);
            e.Style.Background = background;
            e.Handled = true;
        }

    Partial Public Class MainPage
    Inherits UserControl
    Private dataProvider As IOlapDataProvider
    Public OlapDataManager As Object
    Public Sub New()
        InitializeComponent()
        InitializeConnection()
Me.grid.InternalGrid.QueryCellInfo += New Syncfusion.Windows.Controls.Grid.GridQueryCellInfoEventHandler(InternalGrid_QueryCellInfo)
    End Sub
    Private Sub InitializeConnection()
            Binding customBinding = New CustomBinding(New BinaryMessageEncodingBindingElement(), New HttpTransportBindingElement 
            {
        MaxReceivedMessageSize = 2147483647
            })
        Dim address As EndpointAddress = New EndpointAddress("http://bi.syncfusion.com/OlapWcfProject/Services/OlapManager.svc/binary")
            Dim clientChannel As ChannelFactory<IOlapDataProvider> =  New ChannelFactory<IOlapDataProvider>(customBinding,address) 
        dataProvider = clientChannel.CreateChannel()
        Dim olapDataManager As OlapDataManager = New OlapDataManager()
        olapDataManager.DataProvider = dataProvider
        olapDataManager.SetCurrentReport(CreateOlapReport())
        Me.OlapDataManager = olapDataManager
    End Sub
    Private Sub InternalGrid_QueryCellInfo(ByVal sender As Object, ByVal e As Syncfusion.Windows.Controls.Grid.GridQueryCellInfoEventArgs)
        e.Style.CellType = "Value"
        e.Style.CellValue = "$234509000.00"
        Dim background As SolidColorBrush = New SolidColorBrush(Colors.Cyan)
        e.Style.Background = background
        e.Handled = True
    End Sub