Exception thrown when resources declaration order changed.

Question

I get exception when declare resources in this order:

<Window.Resources>
    <sys:Object x:Key="resourceA"></sys:Object>

    <x:Array x:Key="resourceB" Type="sys:String">
        <sys:String>foo</sys:String>
    </x:Array>
</Window.Resources>

and when declare this way, all works:

<Window.Resources>
    <x:Array x:Key="resourceB" Type="sys:String">
        <sys:String>foo</sys:String>
    </x:Array>

    <sys:Object x:Key="resourceA"></sys:Object>
</Window.Resources>

The Exception thrown is:

Cannot convert the value in attribute 'ItemsSource' to object of type 'System.Collections.IEnumerable'. 'System.Windows.Markup.ArrayExtension' is not a valid value for property 'ItemsSource'. Error at object 'System.Windows.Controls.ComboBox' in markup file 'WpfResourcesBug;component/window1.xaml' Line 18 Position 37.

Full code:

<Window x:Class="WpfResourcesBug.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    Title="Window1" Height="300" Width="300">

    <Window.Resources>
        <sys:Object x:Key="resourceA"></sys:Object>

        <x:Array x:Key="resourceB" Type="sys:String">
            <sys:String>foo</sys:String>
        </x:Array>
    </Window.Resources>

    <StackPanel>
        <ComboBox SelectedIndex="0" ItemsSource="{StaticResource resourceB}" />
    </StackPanel>
</Window>

Answer 1

I think you might find a possible solution here