change some version descriptions in readme

Author: lausannel

README.md

@@ -41,11 +41,12 @@ We have prepared Nuget Package for C# users. Users can directly install the clie
 dotnet add package Apache.IoTDB
 ```
 
-Note that the `Apache.IoTDB` package only supports `.net 5.0`. If you are using `.net framework 4.x`, please refer to the section [starting from .net framework 4.x](#starting-from-net-framework-4x).
+Note that the `Apache.IoTDB` package only supports versions greater than `.net framework 4.6.1`.(#starting-from-net-framework-4x).
 
 ## Prerequisites
 
-    .NET SDK Version == 5.0 
+    .NET SDK Version >= 5.0 
+    .NET Framework >= 4.6.1
 
 ## How to Use the Client (Quick Start)
 
@@ -54,7 +55,8 @@ Users can refer to the test code in [tests](https://github.com/eedalong/Apache-I
 ## Developer environment requirements for iotdb-client-csharp
 
 ```
-.NET SDK Version == 5.0
+.NET SDK Version >= 5.0
+.NET Framework >= 4.6.1
 ApacheThrift >= 0.14.1
 NLog >= 4.7.9
 ```
@@ -67,13 +69,4 @@ NLog >= 4.7.9
 ### Command Line Tools
 
 ## Publish your own client on nuget.org
-You can find out how to publish from this [doc](./PUBLISH.md).
-
-## Starting from `.net framework 4.x`
-In order to adapt to `.net framework 4.x`, we have packaged a nuget package separately, the package name is [`Apache.IoTDB.framework`](https://www.nuget.org/packages/Apache.IoTDB.framework/). 
-
-You can install it through Package Manager (PM), .NET CLI, etc. For example (.NET CLI):
-
-```sh
-dotnet add package Apache.IoTDB.framework --version 0.12.1.2
-```
+You can find out how to publish from this [doc](./PUBLISH.md).

README_ZH.md

@@ -39,18 +39,19 @@ Apache IoTDB Github: https://github.com/apache/iotdb
 dotnet add package Apache.IoTDB
 ```
 
-请注意，`Apache.IoTDB`这个包仅支持`.net 5.0`。 如果您使用的是`.net framework 4.x`，请参考[从`.net framework 4.x`开始](#从-net-framework-4x-开始)。
-
+请注意，`Apache.IoTDB`这个包仅支持大于`.net framework 4.6.1`的版本。
 ## 环境准备
 
-    .NET SDK Version == 5.0 
+    .NET SDK Version >= 5.0
+    .NET Framework >= 4.6.1 
 
 ## 如何使用 (快速上手)
 用户可参考[使用样例](https://github.com/eedalong/Apache-IoTDB-Client-CSharp-UserCase)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
-    .NET SDK Version == 5.0
+    .NET SDK Version >= 5.0
+    .NET Framework >= 4.6.1
     ApacheThrift >= 0.14.1
     NLog >= 4.7.9
 
@@ -63,13 +64,4 @@ dotnet add package Apache.IoTDB
 ### 命令行工具
 
 ## 在 nuget.org 上发布你自己的客户端
-你可以在这个[文档](./PUBLISH.md)中找到如何发布
-
-## 从`.net framework 4.x`开始
-为了适配`.net framework 4.x`，我们单独构建了一个Nuget包，包名是[`Apache.IoTDB.framework`](https://www.nuget.org/packages/Apache.IoTDB.framework/)。
-
-您可以使用PM、.NET CLI等工作来安装它。以.NET CLI为例：
-
-```sh
-dotnet add package Apache.IoTDB.framework --version 0.12.1.2
-```
+你可以在这个[文档](./PUBLISH.md)中找到如何发布