The attachable property 'MergedDictionaries' was not found in type 'ResourceDictionary'

[Kannan]

We have an application previously developed based on Telerik Silverlight Components for Silverlight V2.0. The VS 2008 based solution uses .NET 3.5 along with Silverlight 2.0.

Now we are in the process of converting this project to .NET 4.0 along with Silverlight 4.0 based Telerik Components (Trial Version).

We have converted the project sucessfully and able to build.

But we are getting the below runtime error when the "InitializeComponent();" in an user control is executed.
"The attachable property 'MergedDictionaries' was not found in type 'ResourceDictionary'"

The following is the code.

 

 

 

 

<UserControl x:Class="Test.UserControls.TestHeader"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:core="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls"

xmlns:navigation="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"

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

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls"

>

<telerik:ResourceDictionary.MergedDictionaries>

<telerik:ResourceDictionary Keys="

MouseOverBrush

BorderOuterBrush

SeparatorLine1

SeparatorLine2

Visible

Collapsed

RadMenu_PopupShadowBorder1

RadMenu_PopupShadowBorder2

SelectedBrush

ContentBackgroundBrush

DisabledBrush"

Source="/Test;component/UserControls/Common.xaml" />

</telerik:ResourceDictionary.MergedDictionaries>

 

When I mouse over the above code in the designer I get the same error.

The following are the assembly information

System.Windows.Controls
Run Time Version: v2.0.50727
C:\Program Files\Microsoft SDKs\Silverlight\v4.0\Libraries\Client\System.Windows.Controls.dll
Version: 2.0.5.0

Telerik.Windows.Controls
Run Time Version: v2.0.50727
C:\Program Files\Telerik\RadControls for Silverlight Q2 2010\Binaries\Silverlight\Telerik.Windows.Controls.dll
Version: 2010.2.714.1040

Telerik.Windows.Controls.Navigation
Run Time Version: v2.0.50727
C:\Program Files\Telerik\RadControls for Silverlight Q2 2010\Binaries\Silverlight\Telerik.Windows.Controls.Navigation.dll
Version: 2010.2.714.1040

Can anybody give me clue on what is causing the exception.

Thanks

[Vanya Pavlova]

Hello Kannan,

This error occurs because the ResourceDictionary is not defined in the resource collection.
You should use the following makrup:

<UserControl.Resources>
  <ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
      <ResourceDictionary Source="dictionary1.xaml"/>
      <ResourceDictionary Source="dictionary2.xaml"/>
    </ResourceDictionary.MergedDictionaries>
  </ResourceDictionary>
</UserControl.Resources>

Please let me know if you need any further assistance.

Best wishes,
Vanya Pavlova
the Telerik team