Xaml Namspace Question

I hope I've posted this question in the right place.
I've got a project to display multiple points on a bing silverlight map. I found an example of this at http://beyondrelational.com/blogs/di...ta-source.aspx but its in C#. I worked my way through recoding this into vb.
Here is the Xaml:

Code:

---

<UserControl x:Class="CrashTest.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:m="clr-namespace:Microsoft.Maps.MapControl;assembly=Microsoft.Maps.MapControl"
    xmlns:t="clr-namespace:CrashTest1; assembly=CrashTest"
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
    <UserControl.Resources>
        <DataTemplate x:Key="LogoTemplate">
            <m:Pushpin m:MapLayer.Position="{Binding Location}" Background="Blue">
                <ToolTipService.ToolTip >
                    <TextBlock Text="{Binding Address}"></TextBlock>
                </ToolTipService.ToolTip>
            </m:Pushpin>
        </DataTemplate>
        <t:LocationDataCollection x:Key="LocationList" IsDataSource="True"/>
    </UserControl.Resources>
    <Grid x:Name="LayoutRoot">
        <m:Map  x:Name="MyMap" CredentialsProvider="AoJgw4TfyKo-D2xbQx-XD8M_O8EJyKu3dZ_TzqKzYwLe6aIQyuW-BciCYra4nJGK"
                Mode="Road"  RenderTransformOrigin="0.42,0.557" Margin="0,0,0,0"
                LogoVisibility="Collapsed"  >
            <m:MapItemsControl x:Name="ListOfItems"
                        ItemTemplate="{StaticResource LogoTemplate}"
                        ItemsSource="{StaticResource LocationList}">
            </m:MapItemsControl>
        </m:Map>
    </Grid>
</UserControl>

---

and here is the vb code:

Code:

---

Imports System
Imports System.IO
Imports System.Net
Imports System.Collections
Imports System.Collections.ObjectModel
Imports System.Xml.Serialization
Imports System.Reflection
Imports Microsoft.Maps.MapControl
Imports System.Xml
Imports System.Data

Namespace CrashTest1



    Public Class LocationData
        Public Property Location() As Location
            Get
                Return Location
            End Get
            Set(ByVal value As Location)

            End Set
        End Property
        Public Property Address() As String
            Get
                Return Address
            End Get

            Set(ByVal value As String)

            End Set
        End Property
        Public Property CadCalls_Link() As Integer
            Get
                Return CadCalls_Link
            End Get
            Set(ByVal value As Integer)

            End Set
        End Property
        'Date of call
        'Public Property Date_Retrieved() As Date
        ' Get
        '  Return Date_Retrieved
        ' End Get
        ' Set(ByVal value As Date)
        '
        ' End Set
        'End Property
        Public Sub LocationData()
            Me.Location = New Location()

        End Sub

    End Class
End Namespace

---

The error I am getting is this:
Error 1 The tag 'LocationDataCollection' does not exist in XML namespace 'clr-namespace:CrashTest1; assembly=CrashTest'.
Can anyone help me figure out this namespace error?