Query content of multiple checkboxes

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Silverlight

Good Morning all

I have a set of checkboxes, each one contains a year as it's content beginning with 2005 and ending at 2013.

These years represent an attribute in a field from a REST service.
The field is "Year"

I would like the user to have the ability to check any number of these checkboxes and have a CLICK button that executes a query based on these selections.

i.e. If the user selects checkboxes, 2005, 2006, and 2009 the query will search the content of these checkboxes only.

Maybe adding what I have might help--

Partial Public Class MainPage
    Inherits UserControl
    Dim _year As String


    Public Sub New()
        InitializeComponent()

    End Sub

    Private Sub btnExecute_Click(sender As Object, e As RoutedEventArgs)
        For Each myCheckBox As CheckBox In stkPanel.Children.OfType(Of CheckBox)().Where(Function(myCheckBoxx) myCheckBoxx.IsChecked.Equals(True))
            _year = myCheckBox.Content.ToString()
        Next


        Dim _QueryTask As New QueryTask("http://speedo:6080/arcgis/rest/services/ems/EMS_CALLS/MapServer/0")
        AddHandler _QueryTask.ExecuteCompleted, AddressOf QueryTask_ExecuteCompleted

        Dim _query As New ESRI.ArcGIS.Client.Tasks.Query()
        _query.OutFields.Add("Year")
        _query.Where = "Year = '" & _year & "'"
        _query.ReturnGeometry = True

        _QueryTask.ExecuteAsync(_query)

    End Sub

    Private Sub QueryTask_ExecuteCompleted(sender As Object, e As QueryEventArgs)
        Dim _layer As GraphicsLayer = TryCast(myMap.Layers("myLayer"), GraphicsLayer)
        _layer.Graphics.Clear()
        Dim _featureSet As FeatureSet = e.FeatureSet
        If _featureSet IsNot Nothing AndAlso _featureSet.Features.Count > 0 Then
            For Each _featureGraphic As Graphic In e.FeatureSet.Features
                _featureGraphic.Symbol = TryCast(LayoutRoot.Resources("red"), ESRI.ArcGIS.Client.Symbols.Symbol)
                _layer.Graphics.Add(_featureGraphic)
            Next _featureGraphic
        End If
    End Sub

End Class

Thank you - using Silverlight (XAML/VB)