Silverlight 在运行时未找到Prism AttachedProperty命令

我的解决方案编译得很好，没有错误，但是当我运行Silverlight项目时，我得到了这个错误：在类型“TextBoxKeyUp”中找不到可附加属性“Command”。我在过去成功地创建了一些行为，而这个行为的代码相对来说是微不足道的

XAML代码段：

        xmlns:prismCmd="clr-namespace:AGMGUI.Infrastructure.AttachedProperty;assembly=AGMGUI.Infrastructure"

            <TextBox Grid.Column="2" Text="{Binding InputFieldText, Mode=TwoWay}" 
                 TabIndex="1" Width="100" Height="24" HorizontalAlignment="Left" 
                 VerticalAlignment="Center" prismCmd:TextBoxKeyUp.Command="{Binding KeyUpCommand}"></TextBox>

---

以前有人遇到过这个错误吗？

我发现我的shell项目没有包含对我拥有AttachedProperty类的项目的引用。一旦我添加了引用，它就像一个符咒

作为测试，尝试将“Command”重命名为“MyCommand”。我暗自怀疑，命令可能被保留了。

    public static class TextBoxKeyUp
{

    #region Command  attached property
    public static ICommand GetCommand(DependencyObject obj)
    {
        return (ICommand)obj.GetValue(CommandProperty);
    }

    public static void SetCommand(DependencyObject obj, ICommand value)
    {
        obj.SetValue(CommandProperty, value);
    }

    // Using a DependencyProperty as the backing store for Command.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty CommandProperty =
        DependencyProperty.RegisterAttached("Command", typeof(ICommand), typeof(TextBoxKeyUp), new PropertyMetadata(OnSetCommandCallback));

    private static void OnSetCommandCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
    {
        TextBox element = dependencyObject as TextBox;
        if (element != null)
        {
            TextBoxKeyUpBehavior behavior = GetOrCreateBehavior(element);
            behavior.Command = e.NewValue as ICommand;
        }
    }
    private static TextBoxKeyUpBehavior GetOrCreateBehavior(TextBox element)
    {
        TextBoxKeyUpBehavior behavior = element.GetValue(KeyUpBehaviorProperty) as TextBoxKeyUpBehavior;
        if (behavior == null)
        {
            behavior = new TextBoxKeyUpBehavior(element);
            element.SetValue(KeyUpBehaviorProperty, behavior);
        }
        return behavior;
    }
    #endregion

    #region KeyUpBehavior attached property
    public static TextBoxKeyUpBehavior GetKeyUpBehavior(DependencyObject obj)
    {
        return (TextBoxKeyUpBehavior)obj.GetValue(KeyUpBehaviorProperty);
    }

    public static void SetKeyUpBehavior(DependencyObject obj, TextBoxKeyUpBehavior value)
    {
        obj.SetValue(KeyUpBehaviorProperty, value);
    }

    public static readonly DependencyProperty KeyUpBehaviorProperty =
        DependencyProperty.RegisterAttached("KeyUpBehavior", typeof(TextBoxKeyUpBehavior), typeof(TextBoxKeyUp), null);
    #endregion

    #region CommandParameter attached property
    public static object GetCommandParameter(DependencyObject obj)
    {
        return (object)obj.GetValue(CommandParameterProperty);
    }

    public static void SetCommandParameter(DependencyObject obj, object value)
    {
        obj.SetValue(CommandParameterProperty, value);
    }

    public static readonly DependencyProperty CommandParameterProperty =
        DependencyProperty.RegisterAttached("CommandParameter", typeof(object), typeof(TextBoxKeyUp), new PropertyMetadata(OnSetCommandParameterCallback));

    private static void OnSetCommandParameterCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
    {
        TextBox element = dependencyObject as TextBox;
        if (element != null)
        {
            TextBoxKeyUpBehavior behavior = GetOrCreateBehavior(element);
            behavior.CommandParameter = e.NewValue;
        }
    }
    #endregion
}