Failed to load type "System.Windows.Controls.Primitives.MultiSelector" from the PresentationFramework assembly

Question

I try to use the Grid from WPFToolkit, but I get an error:

DisplayDataMapping.xaml (9,89): errorMC1000: Unknown build error, 'Could not load type 'System.Windows.Controls.Primitives.MultiSelector' from assembly 'PresentationFramework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Line 9 Position 89.' 

Here is the haml:

  <UserControl x: Class = "DisplayDataMapping"
         xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns: x = "http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns: toolkit = "http://schemas.microsoft.com/wpf/2008/toolkit">
         <StackPanel Margin = "10">
             <Border CornerRadius = "5" BorderThickness = "1" Padding = "5" BorderBrush = "WhiteSmoke">
                 <toolkit: DataGrid x: Name = "dataGridPostings" Background = "Transparent"
                             AlternatingRowBackground = "LightSteelBlue" RowBackground = "White" 
                             GridLinesVisibility = "None" HorizontalGridLinesBrush = "SlateGray">
                 </ toolkit: DataGrid>
             </Border>
         </StackPanel>
     </UserControl>
    

Answer 1

The WPF Toolkit depends on the .NET Framework 3.5 SP1 (just in case you don't already know).

Answer 2

Try installing VS08 SP1