[c#/beetlex] update plaintext (#6285)

* update beetlex 1.4.3

update beetlex 1.4.3

* docker add COMPlus_ReadyToRun variable
update beetlex

* update beetlex, enabled thread queue

* beetlex framework add db and queries cases

* add db code

* change result json data

* update query url

* beetlex framework add fortunes cases

* change Content-Type

* add beetlex core cases

* fix queries cases

* update config

* change try readline

* update benchmark config

* Update README.md

* Update README.md

* change versus property

* beetlex-core update .net core to v3.0

* change beetlex-core project file

* beetlex update raw db class

* beetlex update raw db

* beetlex debug plaintext

* change debug docker file

* update beetlex to 1.4.0

* update

* beetlex update core 3.1

* [c#/beetlex] add updates cases

* [c#/beetlex] change Server: TFB, change custom connection pool, add update docker

* fix errors

* change pool init

* change connection pool maxsize

* fix fortunes errors

* clear DBRaw _connectionString value.

* [c#beetlex] change update dbconnection pool size

* [c#/beetlex] udpate spanjson to v3.0.1, Npgsql v5.0.0

* [c#/beetlex] add caching sample

* set connectionstring multiplexing

* remove connection multiplexing setting

* [c#/beetlex]change NpgsqlParameter to  NpgsqlParameter<T>

* [c#/beetlex] update dbraw

* [c#/beetlex] change connection string

* [c#/beetlex]  add fortunes cases to core-updb

* update beetlex 1.5.6

* update 5.0.0-alpha1

* update docker file

* Enabled IOQueues

* Set IOQueues debug mode

* update

* [c#/beetlex] udpate to v1.6.0.1-beta

* update pg drive

* [c#/beetlex] update to beetlex v1.6.3 and support pipelining

* set options

* [c#/beetlex] Optimized actions

* [c#/beetlex] update plaintext

frameworks/CSharp/beetlex/PlatformBenchmarks/HttpHandler.cs

@@ -312,7 +312,7 @@ namespace PlatformBenchmarks
         {
 
             token.FullLength((stream.CacheLength - token.ContentPostion).ToString());
-            if (token.Requests.IsEmpty)
+            if (token.Requests.IsEmpty && stream.Length == 0)
                 session.Stream.Flush();
         }