Databinding Enum to ComboBox - wpf

Question

I'm getting a very unusual error on a project that use to work where I'm trying to bind an ENUM to a combo box. To ensure I've not made coding errors, I've made a new usercontrol using SO Question 58743 and ageektrapped as samples for a self contained user control. I'm using .Net4 Client Framework as the environment and VS2010. The xaml is -
<UserControl x:Class="Barcode.Views.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:System="clr-namespace:System;assembly=mscorlib"
mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
<ObjectDataProvider MethodName="GetValues"
ObjectType="{x:Type System:Enum}"
x:Key="AlignmentValues">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="HorizontalAlignment" />
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</UserControl.Resources>
<Grid>
<ComboBox Name="myComboBox" SelectedIndex="0" Margin="8"
ItemsSource="{Binding Source={StaticResource AlignmentValues}}" />
</Grid>
</UserControl>
The error that I'm getting on the ComboBox is Error 144 Unable to cast object of type 'System.String' to type 'System.Windows.DataTemplate' after building the project.
I'm at a loss as to what could be causing this error.

Answer 1

Looks like you may be missing the namespace on your HorizontalAlignment. Add a relevant namespace where the HorizontalAlignment type resides.
xmlns:local="clr-namespace:Barcode.Views"
Then modify your XAML to make use of the newly defined namespace...
...
<x:Type TypeName="local:HorizontalAlignment"/>
...
EDIT:
With this being the HorizontalAlignment enum type from within the framework then your code should work as is. I tested it to be certain and it indeed works; as I placed an instance of the UserControl on my Window and it worked without a hitch. Set up an empty project and start from scratch to see if the problem still exists as you may have other factors causing the issue.