App.xaml

<Application x:Class="TestApp.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="View/MainWindow.xaml"
             xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml" xmlns:converters="clr-namespace:TestApp.Converters">
    <Application.Resources>
        <ResourceDictionary>
            <converters:RussianDateConverter x:Key="RussianDateConverter"/>
            <converters:StringToFlowDocConverter x:Key="FlowDocToString"/>
            <converters:BoolToVisibilityConverter x:Key="BoolConv"/>
            <converters:ImageToBitmapImageConverter x:Key="ImageToBitmapImageConverter"/>
            <converters:DateOnlyToDateTimeConverter x:Key="DateOnlyToDate"/>

            <FontFamily x:Key="SegoeFluentIcons">pack://application:,,,/;component/Fonts/#Segoe Fluent Icons</FontFamily>

            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/Wpf.Ui;component/Resources/Theme/Light.xaml" />
                <ResourceDictionary Source="pack://application:,,,/Wpf.Ui;component/Resources/Wpf.Ui.xaml" />
                <ResourceDictionary Source="/Resources/Styles.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>