FloatingStatusWindow/Library/StartManager.cs

using Common.Wpf.Extensions;
using System;
using System.Windows;

namespace FloatingStatusWindowLibrary
{
    public static class StartManager
    {
        public delegate void AutoStartChangedEventHandler(bool autoStart);

        public static event AutoStartChangedEventHandler AutoStartChanged = delegate { };

        public static bool ManageAutoStart { get; set; }

        private static bool _autoStartEnabled;
        public static bool AutoStartEnabled
        {
            get
            {
                return ManageAutoStart && _autoStartEnabled;
            }
            set
            {
                if (!ManageAutoStart)
                    throw new InvalidOperationException("Cannot set AutoStartEnabled when ManageAutoStart is False");

                _autoStartEnabled = value;

                Application.Current.SetStartWithWindows(_autoStartEnabled);
                AutoStartChanged(_autoStartEnabled);
            }
        }
    }
}