Difficult to answer without seeing your code.
I guess the ItemsSource is initialized by code. It should be initialized to a collection of Dictionary.
From your description it looks like it's well initialized to a collection (because you see the correct number of item).
But either the item is not a dictionary or the key "Descr" is not existing in the dictionary.
This code and the XAML above worked just fine before the upgrade. Private Sub LocatorTask_AddressToLocationsCompleted(ByVal sender As Object, ByVal args As AddressToLocationsEventArgs)
Dim FullList As List(Of AddressCandidate) = args.Results
Dim returnedCandidates As New List(Of AddressCandidate)
For Each AddressCandidate As AddressCandidate In FullList
If (AddressCandidate.Attributes("State") = "Louisiana" Or AddressCandidate.Attributes("State") = "Texas") Then
returnedCandidates.Add(AddressCandidate)
End If
Next
If returnedCandidates.Count = 1 Then
Dim best As AddressCandidate = returnedCandidates(0)
Dim env As New Envelope() With {.XMin = Double.Parse(best.Attributes("West_Lon").ToString(), CultureInfo.InvariantCulture), _
.YMin = Double.Parse(best.Attributes("South_Lat").ToString(), CultureInfo.InvariantCulture), _
.XMax = Double.Parse(best.Attributes("East_Lon").ToString(), CultureInfo.InvariantCulture), _
.YMax = Double.Parse(best.Attributes("North_Lat").ToString(), CultureInfo.InvariantCulture)}
Dim MyDescr As String = best.Attributes("Descr").ToString.Replace(", United States", "")
locationTextBox.Text = MyDescr
env = env.GeographicEnvToWebMercatorEnv 'Extension Method
Map.ZoomTo(env)
ElseIf returnedCandidates.Count > 1 Then
locationResults.Visibility = Visibility.Visible
locationResults.ItemsSource = returnedCandidates
Else
locationTextBox.Text = "Location Not Found (LA/TX)"
End If
End Sub
