From 2636a9fd4f94f3cf9b310687ad7324902b98989b Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Thu, 28 Nov 2019 20:37:46 +0900
Subject: [PATCH] [Modify] Add it

---
 websocket-sharp/Net/HttpListenerResponse.cs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/websocket-sharp/Net/HttpListenerResponse.cs b/websocket-sharp/Net/HttpListenerResponse.cs
index d5d0ca90..b4142ec5 100644
--- a/websocket-sharp/Net/HttpListenerResponse.cs
+++ b/websocket-sharp/Net/HttpListenerResponse.cs
@@ -629,6 +629,17 @@ namespace WebSocketSharp.Net
       _context.Connection.Close (force);
     }
 
+    private static string createContentType (string value, Encoding encoding)
+    {
+      if (value.IndexOf ("charset=", StringComparison.Ordinal) > -1)
+        return value;
+
+      if (encoding == null)
+        return value;
+
+      return String.Format ("{0}; charset={1}", value, encoding.WebName);
+    }
+
     private IEnumerable<Cookie> findCookie (Cookie cookie)
     {
       if (_cookies == null || _cookies.Count == 0)