更新

AppShutdownCoordinator.cs

@@ -0,0 +1,65 @@
+using System;
+using System.ComponentModel;
+using System.Threading;
+using System.Windows;
+using System.Windows.Threading;
+
+namespace 自救器呼吸器综合检验仪
+{
+    internal static class AppShutdownCoordinator
+    {
+        private static int _shutdownRequested;
+
+        public static bool IsShutdownInProgress
+        {
+            get
+            {
+                Application application = Application.Current;
+                if (application == null)
+                {
+                    return Interlocked.CompareExchange(ref _shutdownRequested, 0, 0) == 1;
+                }
+
+                return Interlocked.CompareExchange(ref _shutdownRequested, 0, 0) == 1
+                    || application.Dispatcher.HasShutdownStarted
+                    || application.Dispatcher.HasShutdownFinished;
+            }
+        }
+
+        public static void RequestShutdown()
+        {
+            Application application = Application.Current;
+            if (application == null)
+            {
+                return;
+            }
+
+            if (Interlocked.Exchange(ref _shutdownRequested, 1) == 1)
+            {
+                return;
+            }
+
+            application.Dispatcher.BeginInvoke(
+                DispatcherPriority.ApplicationIdle,
+                new Action(() =>
+                {
+                    if (application.Dispatcher.HasShutdownStarted || application.Dispatcher.HasShutdownFinished)
+                    {
+                        return;
+                    }
+
+                    application.Shutdown();
+                }));
+        }
+
+        public static bool ShouldSuppressDuringShutdown(Exception exception)
+        {
+            if (!IsShutdownInProgress || exception == null)
+            {
+                return false;
+            }
+
+            return exception is InvalidOperationException || exception is Win32Exception;
+        }
+    }
+}