From 19b8e377c41e799825bb543db5e53df6226d1726 Mon Sep 17 00:00:00 2001
From: oneRain <onerain88@gmail.com>
Date: Wed, 27 Jan 2021 11:45:44 +0800
Subject: [PATCH] fix: get non-exist key exception

---
 Realtime/Realtime/Conversation/LCIMConversation.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Realtime/Realtime/Conversation/LCIMConversation.cs b/Realtime/Realtime/Conversation/LCIMConversation.cs
index f74ace8..ed6e75b 100644
--- a/Realtime/Realtime/Conversation/LCIMConversation.cs
+++ b/Realtime/Realtime/Conversation/LCIMConversation.cs
@@ -136,7 +136,10 @@ namespace LeanCloud.Realtime {
         /// <returns></returns>
         public object this[string key] {
             get {
-                return customProperties[key];
+                if (customProperties.TryGetValue(key, out object val)) {
+                    return val;
+                }
+                return null;
             }
             set {
                 customProperties[key] = value;