Hotfix/xiaolei/td 11769 website csharp chapter 404 (#8913)

* [TD-11769]<docs>:official site csharp chapter 404 hyperlink

* fix link in Csharp connector doc twice

documentation20/cn/08.connector/docs.md

@@ -1052,7 +1052,7 @@ HTTP 请求 URL 采用 `sqlutc` 时，返回结果集的时间戳将采用 UTC
 
 示例程序源码位于
 * {client_install_directory}/examples/C#
-* [github C# example source code](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C\%23)
+* [github C# example source code](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C%2523)
 
 **注意:** TDengineTest.cs       C#示例源程序,包含了数据库连接参数，以及如何执行数据插入、查询等操作。
 
@@ -1084,7 +1084,7 @@ dotnet add package TDengine.Connector
 ```c# 
 using TDengineDriver;
 ```
-* 用户可以参考[TDengineTest.cs](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C\%23/TDengineTest)来定义数据库连接参数，以及如何执行数据插入、查询等操作。
+* 用户可以参考[TDengineTest.cs](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C%2523/TDengineTest)来定义数据库连接参数，以及如何执行数据插入、查询等操作。
 
 
 **注意：**

documentation20/en/08.connector/docs.md

@@ -855,7 +855,7 @@ Only some configuration parameters related to RESTful interface are listed below
 ### Example Source Code
 you can find sample code under follow directions:
 * {client_install_directory}/examples/C#
-* [github C# example source code](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C\%23)
+* [github C# example source code](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C%2523)
 
 **Tips:** TDengineTest.cs       One of C# connector's sample code that include basic examples like connection,sql executions and so on.
 
@@ -888,7 +888,7 @@ dotnet add package TDengine.Connector
 ```C#
 using TDengineDriver;
 ```
-* user can reference from[TDengineTest.cs](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C\%23/TDengineTest) and learn how to define database connection,query,insert and other basic data manipulations.
+* user can reference from[TDengineTest.cs](https://github.com/taosdata/TDengine/tree/develop/tests/examples/C%2523/TDengineTest) and learn how to define database connection,query,insert and other basic data manipulations.
 
 **Note:**