Drag and Drop within Listbox error

[Michael]

I have been trying to implement drag and drop within a listbox in my application and I can’t seem to get the following lines to work from the tutorial and other solutions that admins have posted on the forum:

    xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows"

                            <vsm:VisualStateManager.VisualStateGroups>

                                <vsm:VisualStateGroup x:Name="DragCue">

                                    <vsm:VisualState x:Name="NoDrop" />

                                    <vsm:VisualState x:Name="DropPossible">

I get the following error message from VS:

The tag 'VisualStateGroup' does not exist in XML namespace 'clr-namespace:System.Windows;assembly=System.Windows'.

Is there something I am missing?

I am using VS2008 in Windows XP and the trial version of Telerik RadControls for WPF.

Any help would be greatly appreciated! :)

[Michael]

Could the problem be VS2008 and .NET3.5?
Cheers

[Vlad]

Hi,

 Generally VisualStateManager is available only in .NET 4. Can you post more info where you have this code?

Kind regards,
Vlad
the Telerik team