Exception Occurs When Unpinning All Windows

[Joe]

Greets,

I am running into an issue where I receive an exception when using the "HasDocumentHost" set to false on the outer docking container.  When I do this and either un-pin all of the windows or set all of them to auto-hide, the last window, upon collapsing, will cause the exception as it is being hidden.  Below is the exception that I receive:

Message: Unhandled Error in Silverlight Application
Code: 4004   
Category: ManagedRuntimeError      
Message: System.InvalidOperationException: Sequence contains no matching element
   at System.Linq.Enumerable.Last[TSource](IEnumerable`1 source, Func`2 predicate)
   at Telerik.Windows.Controls.DockingPanel.ArrangeOverride(Size finalSize)
   at System.Windows.FrameworkElement.ArrangeOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)

Below is the XAML that I am using which causes the exception:

<UserControl x:Class="BaseSilverlightPrototyping.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:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
             xmlns:local="clr-namespace:BaseSilverlightPrototyping"
             xmlns:c="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
             xmlns:r="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls"
             xmlns:rd="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Docking"
             xmlns:clr="clr-namespace:System;assembly=mscorlib"
             mc:Ignorable="d">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition />
        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0"
                    Orientation="Horizontal">
            <Button Width="24"
                    Height="24"
                    Content="A"
                    Margin="2" />
            <Button Width="24"
                    Height="24"
                    Content="B"
                    Margin="2" />
            <Button Width="24"
                    Height="24"
                    Content="C"
                    Margin="2" />
            <Button Width="24"
                    Height="24"
                    Content="D"
                    Margin="2" />
            <Button Width="24"
                    Height="24"
                    Content="E"
                    Margin="2" />
        </StackPanel>

        <rd:RadDocking Grid.Row="1"
                       x:Name="MainDocking"
                       HorizontalContentAlignment="Stretch"
                       HasDocumentHost="False">

            <rd:RadSplitContainer>

                <rd:RadSplitContainer Orientation="Horizontal"
                                      InitialPosition="DockedLeft">

                    <rd:RadPaneGroup>
                        <rd:RadPane Title="Pane 1" />
                    </rd:RadPaneGroup>

                </rd:RadSplitContainer>

                <rd:RadSplitContainer Orientation="Vertical"
                                      InitialPosition="DockedLeft"
                                      rd:DockingPanel.Dock="Right">
                    <rd:RadPaneGroup>
                        <rd:RadPane Title="Pane 2" />
                    </rd:RadPaneGroup>

                    <rd:RadPaneGroup>
                        <rd:RadPane Title="Pane 3" />
                    </rd:RadPaneGroup>
                </rd:RadSplitContainer>
            </rd:RadSplitContainer>
        </rd:RadDocking>

    </Grid>
</UserControl>

Please let me know if there is something I have overlooked.  I am using the 2009_3_1219_Trial version (internal build).

Regards,

Joe

[Miroslav Nedyalkov]

Hello Joe,

 Thank you for pointing us this issue out! We fixed the problem and the fix will be included in the next internal build.

Greetings,
Miroslav Nedyalkov
the Telerik team

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[Joe]

Excellent to hear, thank you much!