XAML（cal :)中的Caliburn.micro定义错误

Question

VS2012 detects an error with my definition of the namespace "cal:" , this is my XAML:

<Window x:Class="TOP.MainWindowView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:cal="http://www.caliburnproject.org"
        Title="MainWindow" Width="1024" Height="768">
    <Grid>
        <ContentControl x:Name="ActiveItem" Background="#FFCB8282" Margin="0,10,0,205"/>

        <ItemsControl x:Name="Items" Margin="0,337,0,0" >
                <ItemsControl.ItemTemplate>
                    <DataTemplate >
                        <Button Content="{Binding DisplayName}"
                             cal:Message.Attach="[Action ActivateItem($this)"  Height="100" Width="100" Margin="20,0,0,0"/>
                </DataTemplate>
                </ItemsControl.ItemTemplate>
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center"/>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
        </ItemsControl>
    </Grid>
</Window>

I also tried with xmlns:cal="clr-namespace:Caliburn.Micro;assembly=Caliburn.Micro" but the result is the same.

If I execute the application, the Action works well, but the detection of the error disturbs specially with the design preview...

Anybody knows how to fix this error?
Thanks in advance!

Answer 1

I once got the same kind of error.

If you have added Caliburn.Micro as a project to your solution, then please remove the project reference from your main Project and readd the reference to Calibrun.Micro

Answer 2

I had similar problem. Point your namespace to Caliburn.Micro.Platform

...
xmlns:cal="clr-namespace:Caliburn.Micro;assembly=Caliburn.Micro.Platform" ...>