Unity Hidden asset manager

HiddenManager.cs

using System.Collections.Generic;
using System.IO;
using System.Linq;
using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;

public class HiddenManager : EditorWindow
{
    private static SortedSet<string> _hiddenPaths;
    private static ListView _listView;

    [MenuItem("Tools/Hidden Manager")]
    public static void ShowWindows()
    {
        // This method is called when the user selects the menu item in the Editor
        EditorWindow wnd = GetWindow<HiddenManager>();
        wnd.titleContent = new GUIContent("Hidden Manager");
    }

    public void CreateGUI()
    {
        // Create a root element
        VisualElement root = rootVisualElement;

        // load hidden path list from file
        var hiddenFile = Application.dataPath + "/../ProjectSettings/HiddenManager.txt";

        if (!File.Exists(hiddenFile)) File.Create(hiddenFile).Close();
        _hiddenPaths = new SortedSet<string>(File.ReadAllLines(hiddenFile).ToList());

        // show hidden path list
        _listView = new ListView(_hiddenPaths.ToList(), 20, 
            () => new Label(),
            (item, index) => (item as Label).text = _hiddenPaths.ElementAt(index));
        _listView.onSelectionChange += (e) => { };
        root.Add(_listView);

        // remove button
        var removeButton = new Button(RemoveHiddenList);
        removeButton.text = "Remove";
        root.Add(removeButton);

        // hide button
        Button hideButton = new Button(MakeHide);
        hideButton.text = "Hide";
        root.Add(hideButton);

        // show button
        Button showButton = new Button(MakeShow);
        showButton.text = "Show";
        root.Add(showButton);
    }

    /// <summary>
    /// Add hidden path for selected object in project window<br/>
    /// Not hidden when now
    /// </summary>
    [MenuItem("Assets/Add Hidden Path")]
    private static void AddHiddenList()
    {
        var hiddenFile = Application.dataPath + "/../ProjectSettings/HiddenManager.txt";

        var paths = new List<string>();
        foreach(var obj in Selection.objects)
        {
            var path = AssetDatabase.GetAssetPath(obj);
            if(!_hiddenPaths.Contains(path))
            {
                _hiddenPaths.Add(path);
                _listView.hierarchy.Add(new Label(path));
            }
        }

        // write
        if (!File.Exists(hiddenFile)) File.Create(hiddenFile).Close();
        File.WriteAllLines(hiddenFile, _hiddenPaths);
    }

    /// <summary>
    ///  Remove hidden path for selected object in HiddenManager window
    /// </summary>
    private void RemoveHiddenList()
    {
        var hiddenFile = Application.dataPath + "/../ProjectSettings/HiddenManager.txt";

        if (_listView.selectedIndex == -1) return;
        _hiddenPaths.Remove(_listView.selectedItem as string);
        _listView.itemsSource = _hiddenPaths.ToList();
        _listView.RefreshItems();

        // write
        if (File.Exists(hiddenFile))
        {
            File.Delete(hiddenFile);
        }
        File.Create(hiddenFile).Close();
        File.WriteAllLines(hiddenFile, _hiddenPaths);
    }

    /// <summary>
    /// Elements hide in Hidden List
    /// </summary>
    private void MakeHide()
    {
        // all Hide
        foreach (var path in _hiddenPaths)
        {
            // dir
            var oldPath = new DirectoryInfo(Application.dataPath + "/../" + path);
            var newPath = new DirectoryInfo(Application.dataPath + "/../" + path + "~");

            if (oldPath.Exists)
            {
                oldPath.MoveTo(newPath.FullName);
            }

            // meta file
            var oldMetaPath = new FileInfo(Application.dataPath + "/../" + path + ".meta");
            var newMetaPath = new FileInfo(Application.dataPath + "/../" + path + "~.meta");

            if(oldMetaPath.Exists)
            {
                oldMetaPath.MoveTo(newMetaPath.FullName);
            }
        }

        AssetDatabase.Refresh();
    }

    /// <summary>
    /// Elements show in Hidden List
    /// </summary>
    private void MakeShow()
    {
        // all Show
        foreach (var path in _hiddenPaths)
        {
            // dir
            var oldPath = new DirectoryInfo(Application.dataPath + "/../" + path + "~");
            var newPath = new DirectoryInfo(Application.dataPath + "/../" + path);

            if (oldPath.Exists)
            {
                oldPath.MoveTo(newPath.FullName);
            }

            // meta file
            var oldMetaPath = new FileInfo(Application.dataPath + "/../" + path + "~.meta");
            var newMetaPath = new FileInfo(Application.dataPath + "/../" + path + ".meta");

            if (oldMetaPath.Exists)
            {
                oldMetaPath.MoveTo(newMetaPath.FullName);
            }
        }

        AssetDatabase.Refresh();
    }
}