How to find the checked state of members inside the member editor?

public MainWindow()
        {
                InitializeComponent();
                this.olapClient1.OlapDataManager = new       
                Syncfusion.Olap.Manager.OlapDataManager("Data 
                Source=http://bi.syncfusion.com/olap/msmdpump.dll;
                Initial Catalog=Adventure Works DW 2008 SE;");
                this.olapClient1.OlapDataManager.SetCurrentReport(SampleReport());
                this.olapClient1.Loaded += olapClient1_Loaded;
        }
void olapClient1_Loaded(object sender, System.Windows.RoutedEventArgs e)
    {
            List<string> childNodeCollection = new List<string>();
            string metaTreeNodeIsSelected= ""; string childNodeIsSelected = "";
            if(this.olapClient1.AxisElementBuilderColumn!=null)
            {
                for(int i=0;i<this.olapClient1.AxisElementBuilderColumn.MetaTreeNodes.Count;i++)
                {
                    if (this.olapClient1.AxisElementBuilderColumn.MetaTreeNodes[i].NodeType.ToString() != "MeasureGroup")
                    {
                    metaTreeNodeIsSelected = this.olapClient1.AxisElementBuilderColumn.MetaTreeNodes[i].IsSelected.ToString();
            for(int j=0;j<this.olapClient1.AxisElementBuilderColumn.MetaTreeNodes[i].ChildNodes.Count;j++)
                    {
                     if (this.olapClient1.AxisElementBuilderColumn.MetaTreeNodes[i].ChildNodes[j].IsSelected == true)
                       {  
                        childNodeIsSelected =this.olapClient1.AxisElementBuilderColumn.MetaTreeNodes[i].ChildNodes[j].Caption.ToString();
                          childNodeCollection.Add(childNodeIsSelected);
                       }
                    }
                 }
             }     
        } 
}

Public Sub New()
InitializeComponent()
Me.olapClient1.OlapDataManager = New Syncfusion.Olap.Manager.OlapDataManager("Data Source=http://bi.syncfusion.com/olap/msmdpump.dll; Initial Catalog=Adventure Works DW 2008 SE;")
Me.olapClient1.OlapDataManager.SetCurrentReport(SampleReport())
AddHandler Me.olapClient1.Loaded, AddressOf olapClient1_Loaded
End Sub
Private Sub olapClient1_Loaded(ByVal sender As Object, ByVal e As  System.Windows.RoutedEventArgs)
Dim childNodeCollection As New List(Of String)()
Dim metaTreeNodeIsSelected As String= ""
Dim childNodeIsSelected As String = ""
If Me.olapClient1.AxisElementBuilderColumn IsNot Nothing Then
For i As Integer = 0 To Me.olapClient1.AxisElementBuilderColumn.MetaTreeNodes.Count - 1
If Me.olapClient1.AxisElementBuilderColumn.MetaTreeNodes(i).NodeType.ToString() <> "MeasureGroup" Then
metaTreeNodeIsSelected = Me.olapClient1.AxisElementBuilderColumn.MetaTreeNodes(i).IsSelected.ToString()
For j As Integer = 0 To Me.olapClient1.AxisElementBuilderColumn.MetaTreeNodes(i).ChildNodes.Count - 1
If Me.olapClient1.AxisElementBuilderColumn.MetaTreeNodes(i).ChildNodes(j).IsSelected = True Then
childNodeIsSelected =Me.olapClient1.AxisElementBuilderColumn.MetaTreeNodes(i).ChildNodes(j).Caption.ToString()
childNodeCollection.Add(childNodeIsSelected)
End If
Next j
End If
Next i
End If
End Sub