When I scroll combobox (not using up-down arrow, but the bar in combobox Vertical Scrollbar).

The combobox item cannot be selected using mouse click and not closing if I click outside combobox area.

i would appreciate any help, thanks in advance. 

var window = new RadWindow

WindowStartupLocation.CenterOwner,

CanClose =

true,

CanMove =

true,

ResizeMode =

ResizeMode.NoResize,

Content =

new UnhandledError(),

Height = 300,

Width = 500

};

window.ShowDialog();

The problem is that the UserControl doesn't get displayed at all in the content.

The UserControl is pure XAML as:

<

UserControl x:Class="PCSWeb.WPFShell.Views.UnhandledError"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Height="300" Width="300" Name="window" Loaded="window_Loaded" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">

<Grid Background="AliceBlue" Height="Auto" Width="Auto">

<Grid.RowDefinitions>

<RowDefinition />

<RowDefinition />

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*" />

</Grid.ColumnDefinitions>

<Border Grid.Row="0" BorderBrush="#feca00" CornerRadius="0,10,20,40"

BorderThickness="2" Height="Auto">

<StackPanel>

<TextBlock Text="Error">adafdfasdf</TextBlock>

</StackPanel>

</Border>

</Grid>

</

UserControl>