NavigationViewConstants.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:converters="clr-namespace:Wpf.Ui.Converters"
    xmlns:system="clr-namespace:System;assembly=mscorlib">

    <system:Double x:Key="NavigationViewLeftIconSize">12</system:Double>
    <system:Double x:Key="NavigationViewItemActiveRectangleHeight">16</system:Double>
    <system:Double x:Key="PaneLeftButtonHeight">40</system:Double>
    <system:Double x:Key="PaneLeftButtonWidth">40</system:Double>

    <system:Double x:Key="NavigationViewFluentIconSize">24</system:Double>
    <system:Double x:Key="PaneToggleButtonHeight">40</system:Double>
    <system:Double x:Key="PaneToggleButtonWidth">40</system:Double>
    <system:Double x:Key="PaneFluentButtonHeight">60</system:Double>
    <system:Double x:Key="PaneFluentButtonWidth">60</system:Double>
    <system:Double x:Key="NavigationViewItemChevronSize">12</system:Double>
    <Thickness x:Key="PaneToggleButtonThickness">1,1,1,1</Thickness>
    
    

    <converters:BackButtonVisibilityToVisibilityConverter x:Key="BackButtonVisibilityToVisibilityConverter" />
    <converters:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter" />
    <converters:NullToVisibilityConverter x:Key="NullToVisibilityConverter" />

</ResourceDictionary>