From aaaee5ed102e54a2fe40209e0ebe967015b29b83 Mon Sep 17 00:00:00 2001
From: Huo Yaoyuan <huoyaoyuan@hotmail.com>
Date: Tue, 16 May 2017 21:46:22 +0800
Subject: [PATCH] Use generic IComparable for message.

---
 osu.Game/Online/Chat/Channel.cs |  2 +-
 osu.Game/Online/Chat/Message.cs | 14 ++------------
 2 files changed, 3 insertions(+), 13 deletions(-)

diff --git a/osu.Game/Online/Chat/Channel.cs b/osu.Game/Online/Chat/Channel.cs
index 2925c3ccb4..93fd0a8956 100644
--- a/osu.Game/Online/Chat/Channel.cs
+++ b/osu.Game/Online/Chat/Channel.cs
@@ -23,7 +23,7 @@ namespace osu.Game.Online.Chat
         [JsonProperty(@"channel_id")]
         public int Id;
 
-        public readonly SortedList<Message> Messages = new SortedList<Message>((m1, m2) => m1.Id.CompareTo(m2.Id));
+        public readonly SortedList<Message> Messages = new SortedList<Message>(Comparer<Message>.Default);
 
         //internal bool Joined;
 
diff --git a/osu.Game/Online/Chat/Message.cs b/osu.Game/Online/Chat/Message.cs
index bf53a68910..c1887e7824 100644
--- a/osu.Game/Online/Chat/Message.cs
+++ b/osu.Game/Online/Chat/Message.cs
@@ -8,7 +8,7 @@ using osu.Game.Users;
 
 namespace osu.Game.Online.Chat
 {
-    public class Message
+    public class Message : IComparable<Message>
     {
         [JsonProperty(@"message_id")]
         public readonly long Id;
@@ -42,17 +42,7 @@ namespace osu.Game.Online.Chat
             Id = id;
         }
 
-        public override bool Equals(object obj)
-        {
-            var objMessage = obj as Message;
-
-            return Id == objMessage?.Id;
-        }
-
-        public override int GetHashCode()
-        {
-            return Id.GetHashCode();
-        }
+        public int CompareTo(Message other) => Id.CompareTo(other.Id);
     }
 
     public enum TargetType