using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace FWindSoft.Wpf
{
    public static class WindowExtension
    {
        private static PropertyInfo m_IsDisposedPropertyInfo;
        /// <summary>
        /// 判断窗体是否释放
        /// </summary>
        /// <param name="window"></param>
        /// <returns></returns>
        public static bool IsDisposed(this System.Windows.Window window)
        {
            if (window == null)
                return true;
            if (m_IsDisposedPropertyInfo == null)
            {
                var type = typeof(System.Windows.Window);
                m_IsDisposedPropertyInfo=type.GetProperty("IsDisposed", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            }

            if (m_IsDisposedPropertyInfo != null)
            {
                return  (bool)m_IsDisposedPropertyInfo.GetValue(window);
            }
            return true;
        }

    }
}