From 5e91a3f0f8ac53c66e3d77897e607956a50f4149 Mon Sep 17 00:00:00 2001
From: Craftplacer <craftplacer@outlook.de>
Date: Wed, 29 Jan 2020 01:59:52 +0100
Subject: [PATCH] Use IndexOf

---
 osu.Game/Online/Chat/MessageNotifier.cs | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/osu.Game/Online/Chat/MessageNotifier.cs b/osu.Game/Online/Chat/MessageNotifier.cs
index 41df7e7291..30784c9934 100644
--- a/osu.Game/Online/Chat/MessageNotifier.cs
+++ b/osu.Game/Online/Chat/MessageNotifier.cs
@@ -130,14 +130,7 @@ namespace osu.Game.Online.Chat
         /// Checks if <paramref name="message"/> contains <paramref name="username"/>, if not, retries making spaces into underscores.
         /// </summary>
         /// <returns>If the <paramref name="message"/> mentions the <paramref name="username"/></returns>
-        public bool IsMentioning(string message, string username)
-        {
-            // sanitize input to handle casing
-            message = message.ToLower();
-            username = username.ToLower();
-
-            return message.Contains(username) || message.Contains(username.Replace(' ', '_'));
-        }
+        public bool IsMentioning(string message, string username) => message.IndexOf(username, StringComparison.OrdinalIgnoreCase) != -1 || message.IndexOf(username.Replace(' ', '_'), StringComparison.OrdinalIgnoreCase) != -1;
 
         public class PrivateMessageNotification : SimpleNotification
         {