Error: Value does not fall within the expected range.

[Kenneth]

I'm upgrading to most recent version of Silverlight controls and have now started getting a bug when attempting to run:

 at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
   at MS.Internal.XcpImports.SetValue(IManagedPeerBase obj, DependencyProperty property, DependencyObject doh)
   at MS.Internal.XcpImports.SetValue(IManagedPeerBase doh, DependencyProperty property, Object obj)
   at System.Windows.DependencyObject.SetObjectValueToCore(DependencyProperty dp, Object value)
   at System.Windows.DependencyObject.SetEffectiveValue(DependencyProperty property, EffectiveValueEntry& newEntry, Object newValue)
   at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet)
   at System.Windows.Controls.ContentPresenter.set_Content(Object value)
   at Telerik.Windows.Controls.InternalWindow.PopupWindowHost.Setup(IWindowDragAware window)
   at Telerik.Windows.Controls.InternalWindow.WindowHostFactory.GetWindowHost(WindowBase window)
   at Telerik.Windows.Controls.WindowBase.ShowWindow(Boolean isModal)
   at Telerik.Windows.Controls.RadWindow.Show()
   at MyTalkTools.SL.MainPage.MainPageLoaded(Object sender, RoutedEventArgs e)
   at MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)

This is the code:

<telerikNavigation:RadWindow
    x:Name="LoginWindow"
    WindowStartupLocation="CenterOwner"
    ResizeMode="NoResize"
    Opened="LoginWindowOpened"
    CanClose="False"
    Closed="LoginWindowClosed"
    Style="{StaticResource Task_Windows}" >
    <telerikNavigation:RadWindow.Header>
        <TextBlock FontSize="20" Foreground="#FFFFFF">MyTalkTools Login</TextBlock>
    </telerikNavigation:RadWindow.Header>
    <Grid Margin="0 15 0 0">
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition />
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <TextBlock FontSize="15" Grid.Row="0" Grid.Column="0" Padding="5,5,5,5" VerticalAlignment="Center" Text="User name" Foreground="White" />
        <TextBox FontSize="12" x:Name="UserNameTextBox" Text="{Binding Path=UserName, Mode=TwoWay}" Width="200" HorizontalAlignment="Left" Grid.Row="0" Grid.Column="1" Margin="5,5,5,5" KeyUp="UserNameTextBoxKeyUp"  />
        <TextBlock FontSize="15" Grid.Row="1" Grid.Column="0" Padding="5,5,5,5" VerticalAlignment="Center" Foreground="White" Text="Password" />
        <PasswordBox FontSize="12" x:Name="PasswordTextBox" Width="200" HorizontalAlignment="Left" Grid.Row="1" Grid.Column="1" Margin="5,5,5,5" KeyUp="UserNameTextBoxKeyUp"/>
        <TextBlock FontSize="15" x:Name="EmailTextBlock" Grid.Row="2" Grid.Column="0" Padding="5,5,5,5" VerticalAlignment="Center" Visibility="Collapsed" Foreground="White" Text="Email Address"/>
        <TextBox FontSize="12" x:Name="EmailTexBox" Width="200" HorizontalAlignment="Left" Visibility="Collapsed" Grid.Row="2" Grid.Column="1" Margin="5,5,5,5" KeyUp="UserNameTextBoxKeyUp"  />
        <StackPanel Orientation="Horizontal" Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="2" HorizontalAlignment="Right">
            <telerik:RadButton Style="{StaticResource White_RadButtonStyle}" FontSize="12" x:Name="CreateAccountButton"
                               Margin="5" Padding="5" Click="CreateAccountButtonClick"
                               Content="Create New Account" />
            <telerik:RadButton Style="{StaticResource White_RadButtonStyle}" FontSize="12"
                               x:Name="LoginButton" Margin="5"  Padding="5" Click="LoginButtonClick"
                               Content="Login" />
            <telerik:RadButton Style="{StaticResource White_RadButtonStyle}" FontSize="12"
                               x:Name="CreateButton" Margin="5"  Padding="5" Click="CreateButtonClick"
                               Visibility="Collapsed" Content="Create" />
            <telerik:RadButton Style="{StaticResource White_RadButtonStyle}" FontSize="12"
                               x:Name="CancelButton" Margin="5"  Padding="5" Click="CancelButtonClick"
                               Visibility="Collapsed" Content="Cancel" />
        </StackPanel>
    </Grid>
</telerikNavigation:RadWindow>

Any ideas on what's happening? 

[Miroslav Nedyalkov]

Hi Kenneth,

 It seems that the RadWindow tag is not a root of your XAML (the namespace declarations are missing) and this usage of the RadWindow control is not supported. You should either create the RadWindow control in CodeBehind or use it as a root tag in XAML. For more information about how to use the RadWindow control you could refer to this article.

Greetings,
Miroslav Nedyalkov
the Telerik team

[Kenneth]

It's not - because you introduced a big breaking change. 

Creating 15-20 hours of work.

-Ken

[Miroslav Nedyalkov]

Hello Kenneth,

We did this change an year ago, but stayed backwards compatible until the last release. We just decided that it is time to drop this as we decided that it is not correct to place RadWindow in the layout as this has side effects like the layout changes when the window is shown and the bindings are broken as we remove the window from the visual tree in order to open it.

Hope this helps you understand why we dropped this.

Regards,
Miroslav Nedyalkov
the Telerik team