update readme

Author: eedalong

README.md

@@ -47,7 +47,7 @@ dotnet add package iotdb_client_csharp --version 0.12.0
 
 ## How to Use the Client (Quick Start)
 
-Users can refer to the test code in [SessionTest.cs](https://github.com/eedalong/iotdb-client-csharp/blob/main/client/SessionTest.cs) to understand the usage mode of each interface.
+Users can refer to the test code in [tests](https://github.com/eedalong/iotdb-client-csharp/tree/main/client/tests) to understand the usage mode of each interface.
 
 ## Developer environment requirements for iotdb-client-csharp
 

README_ZH.md

@@ -45,7 +45,7 @@ dotnet add package iotdb_client_csharp --version 0.12.0
     .NET SDK Version == 5.0 
 
 ## 如何使用 (快速上手)
-用户可参考[SessionTest.cs](https://github.com/eedalong/iotdb-client-csharp/blob/main/client/SessionTest.cs)中的测试代码了解各个接口使用方式
+用户可参考[测试代码](https://github.com/eedalong/iotdb-client-csharp/tree/main/client/tests)中的测试代码了解各个接口使用方式
 
 
 ## iotdb-client-csharp的开发者环境要求