Reference external xaml styles from library to WPF Main app - wpf

Question

I have one Main App.exe WPF on VB.NET. Application have one library C#.NET.
App reference project library.
I try to get style from external library but give error.
This is my "Sharp.LIB" project: "Dictionaries/Buttons.xaml"
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style TargetType="Button" x:Key="MyButton">
<Setter Property="Background" Value="Green" />
<Setter Property="Width" Value="100" />
<Setter Property="Height" Value="40" />
<Setter Property="Content" Value="Hello from style" />
</Style>
This is my second file "General.xaml" to marge all styles. At now I merge only one Buttons styles.
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Dictionaries/Buttons.xaml" />
</ResourceDictionary.MergedDictionaries>
Here is my usercontrol from Main vb.net app.
<UserControl x:Class="MyWF.UC"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:ms="clr-namespace:MyStyles;assembly=MyStyles" mc:Ignorable="d"
d:DesignHeight="100" d:DesignWidth="100">
<UserControl.Resources>
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MyStyles;component/General.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</UserControl.Resources>
<Grid>
<Button Style="{StaticResource MyButton}" />
</Grid>
This is my second try. Again failed with the same error according missing file.
<UserControl x:Class="MyWF.UC"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:ms="clr-namespace:MyStyles;assembly=MyStyles" mc:Ignorable="d"
d:DesignHeight="100" d:DesignWidth="100">
<UserControl.Resources>
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/MyStyles;component/General.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</UserControl.Resources>
<Grid>
<Button Style="{StaticResource MyButton}" />
</Grid>
Error:
Additional information: 'Set property 'System.Windows.ResourceDictionary.Source' threw an exception.' Line number '27' and line position '18'.
{"Cannot locate resource 'general.xaml'."}
PLEASE HELP.

Answer 1

As this question is unsolved till now: The pack URI should look like this:
<ResourceDictionary Source="pack://application:,,,/$assemblyName$;component/$folder$/Style.xaml"/>
see Resource File Pack URIs:
The following example shows the pack URI for a XAML resource file that is located in a subfolder of the referenced assembly's project folder.
pack://application:,,,/ReferencedAssembly;component/Subfolder/ResourceFile.xaml
e.g.
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/WPF.Controls;component/Templates/Style.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>