Question

Suppose I have a normal Xaml file with two extra xmlns, one to a “Person” Class with two CLR properties “Name” and “Age”, and one to a String object:

<Window x:Class="WpfPractice.ListBinding"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfPractice"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"        
    Title="ListBinding" Height="200" Width="600">

I can place an array of strings in the Resources collection of my root window element:

    <Window.Resources>  
        <x:Array x:Key="ThisWorks" Type="{x:Type sys:String}">  
            <sys:String>John</sys:String>  
            <sys:String>Andy</sys:String>  
        </x:Array>  
    </Window.Resources>

I can also instantiate an object in the resources of the root control:

    <Window.Resources>  
        <local:Person x:Key="ThisAlsoWorks" Name="Michael" Age="40"/>  
    </Window.Resources>

But VS won’t let me build if I instantiate an array of ojects in the resources of the root control:

    <Window.Resources>  
        <x:Array x:Key="ThisWontBuild" Type="{x:Type local:Person}">  
            <local:Person Name="Michael" Age="40"/>  
            <local:Person Name="Jim" Age="30"/>   
        </x:Array>
    </Window.Resources>

Howwver VS will build if I instantiate the array of ojects in the resources of a child control such as a grid:

    <Grid.Resources>  
        <x:Array x:Key="ThisWillBuild" Type="{x:Type local:Person}">  
            <local:Person Name="Michael" Age="40"/>  
            <local:Person Name="Jim" Age="30"/>   
        </x:Array>
    </Grid.Resources>

Anybody know why?

Answer 1

Maybe you were lacking the respective xmlns on the root element?

I cannot think of any other reason why it would not work and i can tell you that it is certainly possible as i do that quite frequently.