From aed1bb045b42e301c639919758396c141e88b760 Mon Sep 17 00:00:00 2001
From: GIT-Desktop <relations99@gmail.com>
Date: Tue, 8 Sep 2020 02:13:53 +0800
Subject: [PATCH] Added null check for dispose

---
 .../Application/MaxMix/Services/Audio/AudioSession.cs    | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Desktop/Application/MaxMix/Services/Audio/AudioSession.cs b/Desktop/Application/MaxMix/Services/Audio/AudioSession.cs
index 5bfbfb38..c9579a4a 100644
--- a/Desktop/Application/MaxMix/Services/Audio/AudioSession.cs
+++ b/Desktop/Application/MaxMix/Services/Audio/AudioSession.cs
@@ -151,10 +151,13 @@ private void OnStateChanged(object sender, AudioSessionStateChangedEventArgs e)
         #region IDisposable
         public void Dispose()
         {
-            _events.StateChanged -= OnStateChanged;
-            _events.SimpleVolumeChanged -= OnVolumeChanged;
+            if (_events != null)
+            {
+                _events.StateChanged -= OnStateChanged;
+                _events.SimpleVolumeChanged -= OnVolumeChanged;
 
-            Session.UnregisterAudioSessionNotification(_events);
+                Session.UnregisterAudioSessionNotification(_events);
+            }
             Session = null;
             _session2 = null;
             _simpleAudio = null;