App.xaml

<?xml version="1.0" encoding="utf-8"?>
<Application
    x:Class="MsGraphSamples.WinUI.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:converters="using:CommunityToolkit.WinUI.Converters">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
                <!-- Other merged dictionaries here -->
            </ResourceDictionary.MergedDictionaries>
            <converters:BoolNegationConverter x:Key="BoolNegationConverter" />
            <converters:StringFormatConverter x:Key="StringFormatConverter" />
            <!-- Other app resources here -->
        </ResourceDictionary>
    </Application.Resources>
</Application>