RegistrySettingsViewModel.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace AdvancedWindowsAppearence
{
    public class RegistrySettingsViewModel: INotifyPropertyChanged
    {

        public ObservableCollection<BoolRegistrySetting> RegistrySettings { get; set; } = new ObservableCollection<BoolRegistrySetting>();

        private bool _isEdited;

        public event PropertyChangedEventHandler PropertyChanged;


        internal void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }


        public bool IsEdited { get => _isEdited; set
            {
                _isEdited = value;
                NotifyPropertyChanged();
            } 
        }
        public void Add(string name, string registrykey, Version winVer)
        {
            var registryPath = @"Software\Microsoft\Windows\DWM";
            AddWithPath(name, registryPath, registrykey, winVer);
        }
        public void AddWithPath(string name, string registrypath, string registrykey, Version minimalWinVer)
        {
            if (minimalWinVer.CompareTo(Environment.OSVersion.Version) >= 0)
            {
                RegistrySettings.Add(new BoolRegistrySetting());
                return;
            }
            BoolRegistrySetting registrySetting = new BoolRegistrySetting(name, registrypath, registrykey);
            registrySetting.PropertyChanged += RegistrySetting_PropertyChanged;
            RegistrySettings.Add(registrySetting);

        }

        private void RegistrySetting_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            IsEdited = true;
        }

        public async Task SaveAll()
        {
            List<Task> tasks = new List<Task>();
            foreach (BoolRegistrySetting registrySetting in RegistrySettings)
            {
                if (registrySetting == null) continue;
                if (!registrySetting.Checked.HasValue) continue;

                tasks.Add(Task.Run(() => registrySetting.SaveToRegistry()));
            }
            await Task.WhenAll(tasks);
        }


        public string GetSettingsInReg()
        {
            string output = "";
            string prevPath = "";
            foreach (var rs in RegistrySettings)
            {
                if (!rs.IsEnabled)
                    continue;
                string curPath = rs.RegistryPath.Replace(rs.RegistryKey + "\\", "");
                if (prevPath != curPath)
                {
                    output += "\n[HKEY_CURRENT_USER\\" + curPath + "]";
                    prevPath = curPath;
                }
                if (rs.Checked.HasValue)
                    output += "\n\"" + rs.RegistryKey + "\"=dword:0000000" + Convert.ToInt32(rs.Checked.Value);
            }

            output += Environment.NewLine + Environment.NewLine;
            return output;
        }
    }
}