From cc2a50cd0f295fa49d91fc6f848d9f2f4af0704e Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Thu, 10 Feb 2022 19:41:35 +0900
Subject: [PATCH] [Modify] Polish it

---
 websocket-sharp/Ext.cs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/websocket-sharp/Ext.cs b/websocket-sharp/Ext.cs
index 955fa21e..16c51d24 100644
--- a/websocket-sharp/Ext.cs
+++ b/websocket-sharp/Ext.cs
@@ -1890,19 +1890,18 @@ namespace WebSocketSharp
         throw new ArgumentNullException ("array");
 
       var len = array.Length;
+
       if (len == 0)
         return String.Empty;
 
-      if (separator == null)
-        separator = String.Empty;
-
       var buff = new StringBuilder (64);
       var end = len - 1;
 
       for (var i = 0; i < end; i++)
         buff.AppendFormat ("{0}{1}", array[i], separator);
 
-      buff.Append (array[end].ToString ());
+      buff.AppendFormat ("{0}", array[end]);
+
       return buff.ToString ();
     }