WPF设计器无法加载Generic.xaml

Question

I have written a WPF Class Library. It has a Generic.xaml file under a themes folder in the project and also a ThemeInfo attribute in the AssemblyInfo.cs file:

[assembly: ThemeInfo(
    ResourceDictionaryLocation.None, 
    ResourceDictionaryLocation.SourceAssembly)]

All works well, except in the designer. I get blue squigly lines anywhere I am using StaticResource to reference my brushes, styles and other resources saying:

The resource '[Resource Name]' cannot be found.

I really want the designer to pick up my Generic.xaml file and show the controls as I have styled them . How can I achieve this?

UPDATE

I have marked Yogesh's answer as correct but here is some more information. I was adding the resource dictionary in the constructor of the App.xaml file, instead of in the xaml. The XAML designer does not seem to execute the code behind for the App.xaml file.

Answer 1

Just add a new page named App.xaml with Application as the root element in the class library with Build Action set to Page . Now add the generic.xaml file as a resource dictionary. Something like this...

<Application x:Class="[YourNamespace].App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="[AbsoluteOrRelativePath]/Generic.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

After you do this, rebuild your project, close all xaml views and reopen them again. This should fix your issue in VS2012/2013 and Blend 2012.