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using System.Diagnostics;
using System.Runtime.InteropServices;

internal static class InputDeviceHelper
{
    [DllImport("User32", SetLastError = true)]
    private static extern uint GetRawInputDeviceList(
        [Out] RAWINPUTDEVICELIST[]? pRawInputDeviceList,
        ref uint puiNumDevices,
        uint cbSize);

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public static class PropertyPatternTest
{
    public static void Test()
    {
        var t = new TestClass();

        // Case 1: False
        TestBase(() => t is { Data: { Length: > 0 } });

        // Case 2: False

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public static class BytesConverter
{
    /// <summary>
    /// Converts 4 data bytes to unsigned integer.
    /// </summary>
    /// <param name="mh">High order bytes when using four data bytes</param>
    /// <param name="ml">Low order bytes when using four data bytes</param>
    /// <param name="sh">High order bytes when using two data bytes</param>
    /// <param name="sl">Low order bytes when using two data bytes</param>
    /// <returns>Unsigned integer</returns>

emoacht

using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

public static class WindowHelper
{
    public static void SetWindowRect(Window window, int x, int y, int width, int height)
    {
        IntPtr windowHandle = new WindowInteropHelper(window).EnsureHandle();

emoacht

using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Xml.Linq;
using Windows.Storage;
using Windows.Storage.Streams;
using Windows.UI.Xaml.Media.Imaging;

emoacht

using System.IO;
using System.Windows.Media.Imaging;
using SkiaSharp;

public static class SKHelper
{
    public static BitmapImage Convert(string filePath)
    {
        using SKImage image = SKImage.FromEncodedData(filePath);
        using SKData encoded = image.Encode(); // PNG format

emoacht

using System;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using Microsoft.Xaml.Behaviors;

public class ItemsControlBehavior : Behavior<ItemsControl>
{

emoacht

using System;
using System.Threading.Tasks;
using System.Windows.Interop;
using Windows.Storage.Pickers;

public static async Task<string?> OpenFileDialog(System.Windows.Window window)
{
    var picker = new FileOpenPicker()
    {
        ViewMode = PickerViewMode.Thumbnail

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<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow"
        Width="400" Height="200">
    <Window.Resources>
        <Style x:Key="RoundStyle" TargetType="{x:Type Button}">
            <Setter Property="Width" Value="100"/>
            <Setter Property="Height" Value="100"/>
            <Setter Property="Foreground">

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using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Windows;
using System.Windows.Media;

public static class DependencyObjectExtensions
{
    public static bool TryFindDescendant<T>(this DependencyObject reference, [NotNullWhen(true)] out T? descendant) where T : DependencyObject
    {
        var queue = new Queue<DependencyObject>();