From 47df131e7fd7e07fa01a33e4705cffd8262021b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=80=81=E4=B9=9D?= <366193849@qq.com>
Date: Thu, 1 Dec 2022 00:56:05 +0800
Subject: [PATCH] Avoid to check the type of propertyWriter parameter (#1600)

Refactor code of MqttBufferWriter
---
 Source/MQTTnet/Formatter/MqttBufferWriter.cs | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/Source/MQTTnet/Formatter/MqttBufferWriter.cs b/Source/MQTTnet/Formatter/MqttBufferWriter.cs
index 8757f12e..7e740630 100644
--- a/Source/MQTTnet/Formatter/MqttBufferWriter.cs
+++ b/Source/MQTTnet/Formatter/MqttBufferWriter.cs
@@ -66,7 +66,7 @@ namespace MQTTnet.Formatter
         public static int GetVariableByteIntegerSize(uint value)
         {
             // From RFC: Table 2.4 Size of Remaining Length field
-        
+
             // 0 (0x00) to 127 (0x7F)
             if (value <= 127)
             {
@@ -103,18 +103,12 @@ namespace MQTTnet.Formatter
 
         public void Write(MqttBufferWriter propertyWriter)
         {
-            if (propertyWriter is MqttBufferWriter writer)
-            {
-                WriteBinary(writer._buffer, 0, writer.Length);
-                return;
-            }
-
             if (propertyWriter == null)
             {
                 throw new ArgumentNullException(nameof(propertyWriter));
             }
 
-            throw new InvalidOperationException($"{nameof(propertyWriter)} must be of type {nameof(MqttBufferWriter)}");
+            WriteBinary(propertyWriter._buffer, 0, propertyWriter.Length);
         }
 
         public void WriteBinary(byte[] buffer, int offset, int count)